like 6. It was either a 3 gallon or 6 gallon bowfront, I can't remember which, stocked with 2 angels, 2 common pleco, a comet, 1 neon, 1 zebra danio, and some others I can't remember. Yes, i was that stupid
I was 5 or 6 years old. I started out with a 20g that was waaay overstocked and under filtered with like 20 african cichlids between 2.5"-5" and a small cheap HOB filter.
A 55g with 2 oscars, a channel cat, port cichlid, dempsey, sevrum, common pleco, jag, and a pike cichlid.
Surprisingly they all survived a couple years till I got my 120g.