I want a 4 tank system, 2 for redclaw, and 2 for tilapia.  However I will be starting with goldfish and crayfish to learn the basics.  I have been looking at these totes from walmart, for a month or so and have no idea if they would be safe for the fish.  Would I need to also get pond liner, is there a better alternative? Space / price is a issue. Sterilite 50 Gallon Tote Box- Titanium, Set of 4…