What the EcoPlus Large Round Air Stone Puts Into the Water
Compressed silicate is the material, and it matters because the pore structure is what decides bubble size. This stone is rated for 6 to 10 litres per minute of air, which EcoPlus matches to vessels between 15 and 26.5 gallons. It connects to 3/16 in inside diameter tubing, the standard airline size, and pushes straight on without a barb or clamp. Finer pores make finer bubbles, finer bubbles carry more surface area per unit of air, and surface area is what actually transfers oxygen into solution. Silicate stones do load up over time and start pushing coarse bubbles from one side. That is the signal to replace rather than scrub.
Sizing a Hydroponic Air Stone to the Pump Driving It
A hydroponic air stone is only as good as the pump behind it, and the litres-per-minute figure is the number that has to match. Undersize the pump and the stone gurgles from one face while the rest sits dead. Oversize it and the back pressure finds the weakest joint in the airline. In a deep water culture vessel the stone belongs on the floor, directly under the net pot. The column of bubbles then rises through the root mass rather than beside it. Two smaller stones on a splitter often beat one big one in a wide tank, because coverage matters more than raw volume. Check the bubble pattern weekly, since a partly blocked stone looks fine from above and is doing half the work.
Key Features
- Compressed silicate body: Fine pore structure makes small bubbles, which transfer oxygen far better than coarse ones.
- 6 to 10 litres per minute: A stated air flow window, so the pump can be matched rather than guessed at.
- Suits 15 to 26.5 gallon vessels: The largest of the three EcoPlus round stones, built for full size DWC buckets.
- 3/16 in tubing connection: Pushes onto standard airline with no barb, clamp or adapter.
- Sits flat on the vessel floor: The round profile stays put under a net pot instead of rolling into a corner.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | EcoPlus |
| Product | Large Round Air Stone |
| Part Number | 728405 |
| Material | Compressed silicate |
| Air Flow | 6 to 10 litres per minute |
| Vessel Size | 15 to 26.5 gallons |
| Tubing | 3/16 in inside diameter, 1/4 in outside diameter |
| Shape | Round |
| Use | Reservoirs, deep water culture, aquariums |