| I've seen their systems. The first problem I have is installing two pressurized units in a row. The first will make a big dent in the oxygen being carried by the water and the second will have to do it with what's left. High oxygen levels are a must for good nitrogen conversion. This would be most noticable in the summer mornings. Even to a poing of being a health hazard.
Another problem is pushing water through a unit similar to a sand filter. The glass will creat a high head requiring a larger pump to move the water through. Low head systems can easily pay for themselves when compared with the additional power necessary to move the water. |