I decided to switch to a DSB(even though the benefits aren't as great as in a reef tank) while my main tank is empty of fish. The tank is already cycled so I'll take 1/2 my cc out and replace with sand then wait 2 weeks for the bacteria to switch over to the sand then replace the other half so I don't have to hunt someone down to get LS from them. Anyway, how important is LR in a fish only tank, my LFS sells it but it's $6 a lb and my tank is 110G so it would be really expensive for me