
Originally Posted by
SludgeMunkey
Depends on the substrate used if any. In a set up like yours, It may be wise to have an inch or two of gravel under the substrate, just to help keep solids out of the system.
Filtration is a wise idea in the main reclamation reservoir. A cartridge type canister filter or the like would work well.
Even with filtration though, it would be necessary to change the water every few days.
If you go substrateless, then you have the issue of losing eggs/tadpoles to the drain. This can easily be prevented with bulk filter media over the drains. Additional protection can be provided by using a smaller catch basin in the main reservoir. The water drains to the small basin and then overflows into the main. Any stray eggs or tadpoles will be in the smaller basin.