Hello , my name is Brian , I just bought a 250 gallon fish tank off line with tons of stuff but, but most of it is written in German where the tank and all the accessories came from, It has 3 predrilled holes in the tank and looks like it had a sump filter in it, but it only has 2 of the pipes being going to a a canister filter model eheim 2250, I read that the. Canister filters aren't that great of biological filters. Should I run a wet/dry sump or will the canister filter work for me if I use live rock and/or sand?I'm looking to put in a bamboo shark or 2, a couple sting ray and a eel, any advice, Thanks