I am going to be helping a friend set up a S/W fish only tank.
Using dead coral and crushed coral for substrate.
Size of the tank will be either a 75 gal
. or 120 gal
(Has to talk to the wife ).
If he uses a sump partioned for a foam block and carbon would a cannister filter still be needed? Sump would be used basically as an area to hide heater and other items. I reccomended the sump as he may convert this tank to a reef in the future.
Also how deep should the substrate be in a fish only tank?
Is a protein skimmer needed for a fish only tank?
Type of fish still undecided Due to tank size but he is considering Tangs & Lion size fish.