I have 2 30 gallon tanks. One is a 30 long 36x12x15 and the other is a 30 tall 31x12x18. Im not sure about the heights but I know that they are both 30 gallon tanks but one is longer but not as tall. So my question is, are there any Ps that I can keep in there for life? Im obviously looking in the serra family but what options do I have? I heard that Sanchezi are good in a 30 for life, but what do you think? What other species can I keep in there. If they wont be happy in a 30 then I dont want to get any P at all to put in there, but I know that I would like to add a few more Ps to my collection. I dont have enough money to buy a larger tank,but what do you guys think that I could keep in a 30 gallon? Thank you.