thanks for the compliments. tank is 84X24X24 approx 210gallons. They will be housed in a 600 in the hopefully near future. Filter is a sump I made from a 50g breeder with about 20gallons of bioballs and about 10 gallons of sintered glass. 2Xmag12 returns and 36w UV. Water changes of about 30% every other to every 3 days