Why it is approached differently than average depth or deep pond aeration (or should be)
The typical aeration diffuser module in the pond aeration industry is a EPDM disc style diffuser adapted from the waste water treatment industry. They are proven to be efficient and durable, with a long life. However, if your pond is shallower than 4-5’, the disc style diffuser may not be your best option. The disc diffuser emits the bubbles in a circular pattern, which then spreads as they rise to cover an ever-larger area of the pond. However, if your pond or one area of your pond is less than 4-5’ in depth, the residence time of the bubbles is not ideal. The large bubble plume rising from the disc does not have time to spread, due to the shallow water depth. As a result, the mixing and aeration coverage area for that diffuser is reduced as the water becomes more shallow.
For the shallow pond areas, we typically recommend a product called Lake Bed Aeration Tubing. It is a polypipe (plastic tube) product, with built in ballast to make it sink and stay on the bottom of the pond. The biggest difference is in how the air is emitted. With the Lake Bed Aeration Tubing, the air is emitted from die cut perforations, with one perforation every 3” along the length of that aeration tubing. That spreads the air out tremendously, which increases the coverage area to effectively mix and aerate the shallow areas of your pond. As a result, I can confidently say that one size does NOT fit all! For a custom aeration system that will be effective in your pond, give us a call or contact one of our dealers!