I have 17. No monster unfortunately. All are for breeding purposes or grow up purposes, even the planted tank which has breeding platies, whild type endlers and a breeding pair of ABN's.
3x 55g (one with a duboisi breeding colony, other two for angel/ABN grow outs.)
2x 30g long (one is an angel grow out, the other holds 2 or 3 angel pairs seperated by dividers.)
3x 29g (one is a gold endler breeding colony, one is a planted tank with breeding ABN pair along with platies and wild type endlers, the other goes back and forth between grow out for angels and breeding tank for angel pairs.)
2x 20g long (one is a grow out/holding tank for tropheus duboisi juveniles, the other currently has some bi-color 500 peacocks but will be housing some long fin green dragon bristlenose plecos soon)
8x10g (range from grow outs for livebearers and ABN's, rearing tanks for angels, photo taking tanks for auctions, and temp holding tanks for fish up for sale in auctions)
It's pretty crazy, but I try to keep up with W/C's. I try to do 50% W/C's a week, and place them on a mental list of priority. Angel pairs and finicky juveniles getting top priority, and the planted tank and angel grow outs near the bottom. This mental list helps me get W/C's done on the ones that need it the most if I can't get them all done each week. I do a few each day if I can.