06-18-2006, 03:54 PM
Join Date: Feb 2006
Location: Albany, Upstate New York
iTrader Positive Rating: 100%
If you are talking about undergravel filters, I had to learn the hard way myself. I tried forever to grow plants with one. The only plants that grew were the Java Ferns that grew on the side of the tank that were NOT over the undergravel filter. Everytime I went into the local fish store they would tell me to take it out. But they never told me WHY they are bad for the plants. I finally tore it out and found this great plant growth hidden ON THE side of the tank, again not on top of or over the undergravel filter. The only thing that I can guess is that the water flow is bad somehow for the roots and the root hairs that grow on them. For a better answer, we would need some assistance from one of the wonderful, friendly, down to earth, very smart biologists or chemists. Probably the biologists.