Plants: 1 ( I only have ever had 1 planted tank)
Livebearers: 1 (only guppies)
Cichlids: 0
Bottom Feeders: 1(clown loaches)
Gourami/Betta: 4 (betta's lots of them)
Equipment: 3 (I have had 7 diffrent tanks )
Chemistry: 1 (only certain things)
Saltwater: 2 (only ever had nanos no big tanks)
Diseases: 1 (Ich thats it and onlyever had once)
Critters: 3 (3 diffrent fiddler crab set ups)
Do-it-yourself: 1 (I have fixed filters and bubblers for people)