Right now i run BB , dosing Vodka and 200+ live rocks, is all about Bacteria, if u got the right #,The different bacterias (aerobic and anaerobic) form, in and around the rocks, i run 2.600 gal. return pump + 2 Votech MP40 Wes + 2 x Formerly 7 Magnum 2.750 gal. behind my rocks, detritus go direct on over flow box, via Protein Skimmer and 200 micron filter
sock. NO GFO, i got some Active Carbon on top of return pump. I try to control the PO4 0.00 to 0.03 by "poisoning" the tank w/food, right now i dose 20 ml of Vodka, if i dont feed go 0.00 in two days, if i feed go around 0.03-0.06 depende the amount of the food (Oyster Eggs,Brine Shrimp,Mysis Shrimp,Cyclops,Bloodworms) so lots of flow got more food, more O2, strong and Healthy Fish and Corals just like reef, i crash my tank because of Sand, is true i mess w/Zeovit stuff to, but ask pl. w/DSB ( or google) after 6-7 years ,why they can not control the PO4. And about laws ?!, they said (internet) 3-5 watts per Gal. MH lights and 1-2 lb. live rocks ,per Gal. of water now what about LED per gal. ?! Don't get me wrong, i will love to see some sand , but ppl. (include me) got greedy, more, fishes, more corals, more food , than Po4 start to parking in u Sand.