I'm running a CPR medium sized HOB refugium on a 33 gallon nano tank, got live rock rubble and hydroton balls in the bottom couple of inches and cheato for pods to grow in. I have one male scooter blennie in the tank so he gets all the pods produced. I have no sump on this system and am using an Eheim classic 2217 canister filter filled with Eheim media mixed with hydroton balls as my bio filtration. My skimmer is a Fluval Sea in tank and is collecting nice dark skimate, which is surprizing me as I have never had much luck with these intank units before this one. I got it as part of a trade for some frags and thought I would try it, surprize works great.
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Hey! I never "LEFT" the hobby, just doing fresh water now. Which is still listed as part of Canreef if I'm not mistaken. 
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