z24frank;540740; said:i thought undergravel filters were bad for your tank,am i wrong?
Tongue33;540759; said:Well i kinda disagree with the store owner always knowing whats best..... Thats not always true in allot of cases.. but i don't knock under gravel filters .. Had one myself.. they just don't click with the decoration haters i have keptanother plus to undergravel is reversing the flow... Excellent for oxidizing waste
![]()