{"product_id":"oase-subflo-base-4-d","title":"OASE SubFlo Base 4 D – Underwater aerator for lakes and large deep ponds (2 to 10 m, up to 16,000 m²)","description":"\u003cstyle\u003e.aqp{color:#273a48;line-height:1.6}.aqp h2{font-size:1.3em;margin:30px 0 8px}.aqp .lead{font-size:1.08em}.aqp .tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.aqp .tags span{background:#eef6e0;color:#3d5a0c;border-radius:20px;padding:5px 12px;font-size:.9em;font-weight:600}.aqp svg{width:100%;height:auto;display:block;margin:14px 0 4px}.aqp .note{font-size:.85em;color:#5f6b72}.aqp .tbl{overflow-x:auto}.aqp table{width:100%;border-collapse:collapse;font-size:.95em;min-width:420px}.aqp th{background:#273a48;color:#fff;padding:10px;text-align:left}.aqp td{padding:9px 10px;border-bottom:1px solid #e3eaee}.aqp tr:nth-child(even) td{background:#f5f9fb}.aqp td.cur{background:#eef6e0;font-weight:700}.aqp .box{background:#eef6e0;border-left:4px solid #88be22;padding:12px 14px;margin:16px 0}.aqp .vid{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:8px;margin:14px 0}.aqp .vid iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}.aqp .steps{list-style:none;padding:0;counter-reset:s}.aqp .steps li{counter-increment:s;position:relative;padding:3px 0 12px 44px}.aqp .steps li:before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:#88be22;color:#fff;font-weight:700;text-align:center;line-height:30px}\u003c\/style\u003e\n\u003cdiv class=\"aqp\"\u003e\n\u003cp class=\"lead\"\u003e\u003cstrong\u003eOASE SubFlo Base 4 D\u003c\/strong\u003e is the most powerful underwater aerator in the SubFlo range, designed for lakes and large deep ponds from 2 to 10 m. From the bank, it supplies 3 to 4 diffusers placed on the bottom: their ultra-fine bubbles oxygenate the deep water and circulate the entire water column, on water bodies up to 16,000 m² depending on their depth and shape.\u003c\/p\u003e\n\u003cdiv class=\"tags\"\u003e\n\u003cspan\u003e✓ Depth 2 to 10 m\u003c\/span\u003e\u003cspan\u003e✓ Up to 16,000 m²\u003c\/span\u003e\u003cspan\u003e✓ SAD 200 compressor · 200 L\/min\u003c\/span\u003e\u003cspan\u003e✓ 3 to 4 diffusers\u003c\/span\u003e\u003cspan\u003e✓ Quiet, invisible on the surface\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"box\"\u003e\u003cstrong\u003eAll-in-one:\u003c\/strong\u003e the \u003ca href=\"\/en\/products\/pack-oase-subflo-4-d\"\u003eSubFlo 4 D pack\u003c\/a\u003e combines this base, 4 diffusers and the required tubing.\u003c\/p\u003e\n\u003ch2\u003eWhy aerate from the bottom?\u003c\/h2\u003e\n\u003cp\u003eIn summer, a deep water body separates into layers: warm, oxygenated water at the surface; cold water at the bottom that becomes depleted of oxygen. Organic matter decomposes poorly there: sludge builds up, gases such as hydrogen sulphide and methane form, and the nutrients released keep feeding algae. By injecting air at the bottom, SubFlo breaks up this stratification: oxygen reaches where it is lacking and the bacteria that digest organic matter regain good working conditions.\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 480 262\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-label=\"SubFlo diagram: the base installed on the bank sends air through a weighted tubing to the diffuser placed on the bottom; the bubbles rise and mix the warm surface water with the oxygen-poor bottom water\"\u003e\u003cpath d=\"M0 78H118L150 240H0Z\" fill=\"#6b4f2e\"\u003e\u003c\/path\u003e\u003cpath d=\"M0 70H120V80H0Z\" fill=\"#88be22\"\u003e\u003c\/path\u003e\u003cpath d=\"M124 82H480V240H152Z\" fill=\"#b9dbe8\"\u003e\u003c\/path\u003e\u003cpath d=\"M126 82H480V140H137Z\" fill=\"#e2f1f6\"\u003e\u003c\/path\u003e\u003cpath d=\"M152 226Q320 216 480 226V240H152Z\" fill=\"#6b4f2e\"\u003e\u003c\/path\u003e\u003crect x=\"20\" y=\"40\" width=\"72\" height=\"30\" rx=\"6\" fill=\"#273a48\"\u003e\u003c\/rect\u003e\u003ccircle cx=\"36\" cy=\"55\" r=\"5\" fill=\"#88be22\"\u003e\u003c\/circle\u003e\u003cpath d=\"M92 56H116Q132 56 140 100L156 212Q160 221 172 221H298\" fill=\"none\" stroke=\"#5f6b72\" stroke-width=\"4\"\u003e\u003c\/path\u003e\u003crect x=\"296\" y=\"214\" width=\"72\" height=\"10\" rx=\"5\" fill=\"#3d5a0c\"\u003e\u003c\/rect\u003e\u003cg fill=\"#fff\" stroke=\"#273a48\" stroke-width=\"1\"\u003e\u003ccircle cx=\"312\" cy=\"202\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"332\" cy=\"196\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"352\" cy=\"203\" r=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"320\" cy=\"180\" r=\"3.5\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"344\" cy=\"172\" r=\"3.5\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"328\" cy=\"152\" r=\"4\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"350\" cy=\"140\" r=\"4\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"318\" cy=\"124\" r=\"4.5\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"340\" cy=\"108\" r=\"4.5\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"326\" cy=\"94\" r=\"5\"\u003e\u003c\/circle\u003e\u003c\/g\u003e\u003cg fill=\"none\" stroke=\"#e07b2a\" stroke-width=\"2.5\"\u003e\u003cpath d=\"M372 98Q436 108 436 162Q434 204 380 210\"\u003e\u003c\/path\u003e\u003cpath d=\"M292 98Q252 110 252 160Q254 200 290 208\"\u003e\u003c\/path\u003e\u003c\/g\u003e\u003cg fill=\"none\" stroke=\"#e07b2a\" stroke-width=\"2.5\"\u003e\u003cpath d=\"M388 204L380 210L389 216\"\u003e\u003c\/path\u003e\u003cpath d=\"M282 202L290 208L282 214\"\u003e\u003c\/path\u003e\u003c\/g\u003e\u003cg font-size=\"14\" fill=\"#273a48\" text-anchor=\"middle\"\u003e\u003ctext x=\"56\" y=\"30\" font-weight=\"700\"\u003eSubFlo Base\u003c\/text\u003e\u003ctext x=\"330\" y=\"72\" font-weight=\"700\"\u003eCirculation of the entire water column\u003c\/text\u003e\u003ctext x=\"196\" y=\"104\"\u003eWarm water\u003c\/text\u003e\u003ctext x=\"202\" y=\"178\"\u003eOxygen-poor\u003c\/text\u003e\u003ctext x=\"202\" y=\"194\"\u003ebottom\u003c\/text\u003e\u003ctext x=\"228\" y=\"256\"\u003eWeighted tubing\u003c\/text\u003e\u003ctext x=\"332\" y=\"256\"\u003eDiffuser\u003c\/text\u003e\u003c\/g\u003e\u003c\/svg\u003e\n\u003cp class=\"note\"\u003eSchematic diagram. The number of diffusers and their placement depend on the shape and depth of the water body.\u003c\/p\u003e\n\u003ch2\u003eWhat SubFlo changes in your water body\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxygen at the bottom\u003c\/strong\u003e: the ultra-fine bubbles maximise gas exchange and distribute oxygen evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe entire water column circulated\u003c\/strong\u003e: the rising bubbles mix bottom water with surface water and break up thermal stratification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFewer harmful gases\u003c\/strong\u003e: the circulation helps release the hydrogen sulphide, methane and CO₂ produced at the bottom.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural breakdown of organic matter\u003c\/strong\u003e: in oxygenated water, aerobic bacteria digest deposits more effectively. Over time, less sludge and fewer nutrients available to algae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNothing visible on the surface\u003c\/strong\u003e: no fountain or float, and a sound-insulated base on the bank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eThe SubFlo system on video\u003c\/h2\u003e\n\u003cdiv class=\"vid\"\u003e\u003ciframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/gV_GUZnaaa0\" title=\"OASE SubFlo – underwater aeration for water bodies\" loading=\"lazy\" allow=\"accelerometer; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eWhich SubFlo base for my water body?\u003c\/h2\u003e\n\u003cdiv class=\"tbl\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eSubFlo Base 4 S\u003c\/th\u003e\n\u003cth\u003eSubFlo Base 2 D\u003c\/th\u003e\n\u003cth\u003eSubFlo Base 4 D\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater depth\u003c\/td\u003e\n\u003ctd\u003eUp to 2 m\u003c\/td\u003e\n\u003ctd\u003e2 to 10 m\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003e2 to 10 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicative surface area\u003c\/td\u003e\n\u003ctd\u003eUp to 2,000 m²\u003c\/td\u003e\n\u003ctd\u003eUp to 8,000 m²\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003eUp to 16,000 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor\u003c\/td\u003e\n\u003ctd\u003eSAS 240\u003c\/td\u003e\n\u003ctd\u003eSAD 120\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003eSAD 200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir flow\u003c\/td\u003e\n\u003ctd\u003eUp to 240 L\/min\u003c\/td\u003e\n\u003ctd\u003eUp to 120 L\/min\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003eUp to 200 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e160 W\u003c\/td\u003e\n\u003ctd\u003e500 W\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003e800 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiffusers\u003c\/td\u003e\n\u003ctd\u003e2 to 4 SubFlo Diffuser S\u003c\/td\u003e\n\u003ctd\u003e1 to 2 SubFlo Diffuser D\u003c\/td\u003e\n\u003ctd class=\"cur\"\u003e3 to 4 SubFlo Diffuser D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"note\"\u003eIndicative surface areas provided by OASE; they vary according to the depth and shape of the water body.\u003c\/p\u003e\n\u003ch2\u003eBuild your installation\u003c\/h2\u003e\n\u003col class=\"steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe base\u003c\/strong\u003e: SubFlo Base 4 D, installed on the bank, in a dry spot, near a 230 V socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe diffusers\u003c\/strong\u003e: 3 or 4 SubFlo Diffuser D, supplied empty and weighted on site with gravel or sand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne length of weighted tubing per diffuser\u003c\/strong\u003e: each diffuser is connected to the base by its own length of SubFlo Tubing H, cut from a 30 m or 150 m roll. The tubing sinks to the bottom on its own.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrom the base to the water's edge\u003c\/strong\u003e: UV-resistant SubFlo Tubing L 30 m, if the base is located away from the edge.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eKey features of the SubFlo Base 4 D\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-installed SAD 200 compressor\u003c\/strong\u003e: constant air flow up to 200 L\/min, designed for continuous operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable distribution blocks\u003c\/strong\u003e: the flow to each diffuser can be adjusted individually, to balance aeration between the different areas of the water body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust, sound-insulated housing\u003c\/strong\u003e: it protects the compressor, with a filtered air intake and a built-in cooling fan that extends its service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 m cable\u003c\/strong\u003e, durable materials, low maintenance and simple installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cdiv class=\"tbl\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSubFlo Base 4 D\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOASE reference\u003c\/td\u003e\n\u003ctd\u003e99094\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater depth\u003c\/td\u003e\n\u003ctd\u003e2.00 to 10.00 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicative surface area\u003c\/td\u003e\n\u003ctd\u003eUp to 16,000 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor\u003c\/td\u003e\n\u003ctd\u003eSAD 200, up to 200 L\/min (12,000 L\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e230 V \/ 50-60 Hz, alternating current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e800 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower cable\u003c\/td\u003e\n\u003ctd\u003e10 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e630 × 530 × 510 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight\u003c\/td\u003e\n\u003ctd\u003e24.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible diffusers\u003c\/td\u003e\n\u003ctd\u003e3 to 4 SubFlo Diffuser D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater\u003c\/td\u003e\n\u003ctd\u003eFresh water only (not for swimming pools or seawater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"box\"\u003e\u003cstrong\u003eScope of delivery\u003c\/strong\u003e: the base with its pre-installed SAD 200 compressor and its air distribution blocks. Diffusers and tubing are sold separately, or combined in the \u003ca href=\"\/en\/products\/pack-oase-subflo-4-d\"\u003eSubFlo 4 D pack\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHave our experts size your installation\u003c\/h2\u003e\n\u003cp\u003eSurface area, maximum depth, shape of the water body, location of the power supply: every site is different. Send us this information with a photo or a plan at \u003ca href=\"mailto:support@aquipond.com?subject=SubFlo%20sizing\"\u003esupport@aquipond.com\u003c\/a\u003e or call \u003ca href=\"tel:+3210860354\"\u003e+32 (0)10 86 03 54\u003c\/a\u003e: we will recommend the right base, number of diffusers and tubing lengths. Aquiflor has been supporting water body managers since 1998, and travels across Belgium and France to assess your water body.\u003c\/p\u003e\n\u003ch2\u003eFor a water body that stays healthy\u003c\/h2\u003e\n\u003cp\u003eAeration creates the conditions; bacteria do the work. Combine SubFlo with \u003ca href=\"\/en\/collections\/envasement\"\u003eAquipond Bactovase\u003c\/a\u003e to digest accumulated sludge, and check the KH of the water: below 7 °dH, mineralise first with \u003ca href=\"\/en\/products\/aquipond-nautex-craie-pour-etang-25kg\"\u003eAquipond Nautex\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Oase Living Water","offers":[{"title":"Default Title","offer_id":55392396116295,"sku":"1039089","price":2849.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/2139\/9247\/files\/image_mvjq9vidnp663cj4tm97e2ji4v__88274.1785801931.webp?v=1791797058","url":"https:\/\/www.aquipond.com\/en\/products\/oase-subflo-base-4-d","provider":"Aquipond - Amélioration du biotope en étang ","version":"1.0","type":"link"}