I used to have a ten gallon with
2x Black skirts
2x Plecos
2x Dwarf frogs
5x Cardinal or neon tetra, but one of the plecos ate a frog, the cardinals/neons died of old age, i let the pleco that ate the frog go to a new home so it wouldn't eat other things, the other pleco got to big and we had let it go too then i only had 2 black skirts and a dwarf frog, but i didn't want to get more fish so i got the 1.77 gallon and then the frog died of old age, then the other black skirt died of old age i got a guppy so the black skirt wouldn't be alone it died from getting it from a bad store then i got an apple snail and it died from i thought it would eat algae ONLY but i didn't know that it could have fruits and vegtables, and then i just got back from a canoe trip and i found a pea sized snail their so it is in the tank with the black skirt. this has all happened in a span of 6 years but the black skirt is probably 4 months older between being in the pet shop and growing up from the breeder and it could die any now even though it is very active and in my opinion for the tank size happy, but they are only supposed to live 5 years on average. I still do 50 % water changes every week and rearange the decorations every about 2 weeks. i probably can get a 10 gallon i will tell you guys if i do if i can't i will release the black skirt and the snail into a creek that is by my house or put them on craigslist