Join Date: Jul 2010
Location: Outside Philadelphia, PA
Asking "...what canister is the best?" is about like asking what car is best. It all depends upon what your needs are, and what you want out of it.
My personal choice would be one of the larger Eheim canisters, but I wouldn't call anyone wrong if they chose something else. Brands of canister filters are almost like a religion to some, but I'd say any of the well know brands will do just fine.
Substrata is another area that has a lot of ways to go. There really isn't one best way. Some like Eco-complete. I use it myself, but there are others that use dirt or mud covered by gravel. Others may use ADA aquasoil, which is rather expensive. Again, no really clear choice as far as being better goes.
One final though, discus need a lot of room and special care. If your not really up on all this, do your research and reading before you get involved with them.