wow a sump for a 40g? thats pretty extreme most sumps are larger than 40 gallons.
i would go marine and have a mini reef, purely because you have all that filtration you might aswell make use of crystal clear water quality.
I have a 35g sump on my 40b. People use 5-10gs for sumps towow a sump for a 40g? thats pretty extreme most sumps are larger than 40 gallons.
i would go marine and have a mini reef, purely because you have all that filtration you might aswell make use of crystal clear water quality.
A reef tank is one option. any ideas for freshwater?
problem is the freshwater stocking for a 40g isn't really going to be anything spectacular. you could have a real interesting and amazing reef set up in there, or a few small growing boring cichlids with an overfiltered tank