I have a 90 gallon AGA, factory drilled with corner overflow. Running a 20 gallon sterilite container as a sump, a rio 3100 as a return pump. a lamps now 4X110watt, VHO lights 2 50/50, 1 acitinic, and one aqua sun bulb, 2X250 watt Isawaki mogul base PFO ballast metal halides. One wal-mart special hang on power filter with no media, will soon be filling it with rock rubble for a mini refugium, a turbofloter skimmer, and a nilsen kalkwasser reactor built by GEO, the kalk reactor is run by a flexi flow 3 doser running 300 mls per hour for top off/evaporation, adding a grainger float switch part #2a554 to a powerhead because the doser just doesn't quite keep up with my evaporation with that much lighting. All top off ran out of a 5 gallon bucket. which lasts for about 2 days. So do you think I can keep anything now? I so far just have acropora, a montipora, cupanella, and some red sea xenia in the tank with 2 gold stripe maroon clowns that are MIA, and one hippo tang. the rest of the fish are still an item of debate! running Alaklinity at 12, calcium at 450, ph at 8.2, 0 trites, 0 trates, 0 ammonia