Alright, so I've wanted to get a P. palmas for the longest time (going on two years now), and I think I'm at the point where I can start putting aside money. Rather, I've found a pet store at college that claims they've had several palmas over the summer. 
Here's my plan for the little bugger - the palmas would be the only fish in the tank, period. I don't need to get other fish to make his tank pretty, I'm more than happy to do that on my own with plants and the like. So I feel comfortable getting a 20g long to start him off with. I'm planning to feed him/her a combination of krill, silversides, and Hikari Carnivore pellets and mysis shrimp. I've had tons of experience rasing and caring for fish (spent my summer raising betta fish), so I'm not too concerned about not being able to get the water parameters and temperature at the right levels. The substrate is going to be some sort of sand, with cloth plants until I'm more comfortable with putting live plants in there.
Is the sand a good idea? How about the food? Is the 20g going to be okay for a couple months? How big is too big (aka, how many inches till it's tank upgrade time)?
Any and all help is appreciated!
Here's my plan for the little bugger - the palmas would be the only fish in the tank, period. I don't need to get other fish to make his tank pretty, I'm more than happy to do that on my own with plants and the like. So I feel comfortable getting a 20g long to start him off with. I'm planning to feed him/her a combination of krill, silversides, and Hikari Carnivore pellets and mysis shrimp. I've had tons of experience rasing and caring for fish (spent my summer raising betta fish), so I'm not too concerned about not being able to get the water parameters and temperature at the right levels. The substrate is going to be some sort of sand, with cloth plants until I'm more comfortable with putting live plants in there.
Is the sand a good idea? How about the food? Is the 20g going to be okay for a couple months? How big is too big (aka, how many inches till it's tank upgrade time)?