I'm currently installing a rack of 9 tanks for growing on my young Discus. Original idea was to have a centralised sump filter which would have a constant trickle feed of fresh water and overflow to waste. I'm now thinking it could be better with sponge filters in each tank with an overflow to waste, also a valve that can be opened to dump 50% of the tank to waste for doing bigger water changes. Any thoughts or ideas would be welcomed.
Thanks
