Bubbled bta tank:
35'ish gallon (36" long), no sump, dsb, HOB Emperor for carbon, Remora Pro skimmer w/mag 3 pump, 3 powerheads for water movement, no sump. Lit by a single 250 watt MH, 14K Hamilton. Two-part additive added every day or two (used to be B-ionic and now is Randy's 2-part). Tank was set up in July 2004. The btas host a pair of onyx percs. There's a gbta and an rbta, both bubbled.
Non-bubbled bta tank: 125 gallon tank, 100 gallon sump + 50 gallons in fuge/frag tank, ER 8-2 skimmer, no closed loop (yet), return via Hammerhead pump, bare-bottom tank, dual 400 watt MH 10K bulbs, 220 watts vho (actinic), also use two-part additive (same as in the other tank). This tank was set up in December of 2005 and is the reincarnation of a smaller tank started in November of 2003 (bta didn't bubble in that tank either). The new tank is going through the usual growing pains and starting a bit of an algae issue at the moment. The btas host a pair of gsm. Two of the rbtas are from the same clone as in the other tank, the other rbta is a different clone. None are bubbled.
In both tanks, the btas are fed sporadically--maybe once every week or two. I used to feed them more often, but couldn't keep up with the number of clones I was getting!