Re: looking to start 150gal terrarium and need major advice.
I wouldn't put a dwarf puffer in there. They can be aggressive, they eat fish and if a frog is in the water it might like to have frog legs for lunch! I would go with a betta or even some tetras that are more native to the area where the frogs you put in there are from. Neons look nice and are small so you can have more... Just a thought/suggestion. Sounds like you have quite a fun project ahead of you. I cant wait to do a paludarium some day! Have fun with your project, keep us posted with lots of pics!