Plastic Container Aquarium

Ok, today I had an idea . What if you got a clear plastic container (that is foodsafe), a filter and an overhead light and turned into an aquarium. (No heater because it would melt the plastic)

Has anyone tried or thought of this? Would it work?

I was thinking of 3, 15 litre boxes with a fighting fish/ male betta each

Hmmm, bettas do need more than 15 litres in my opinion. I've never kept mine in less than 25 litres. And they need a heater as they need warmer water than most tropicals, 26 to 27^oC.

If you could locate slightly bigger boxes, they would be better. And as Extreme says, as long as the working end of a heater doesn't touch the plastic there should be no problems heating it.

With small tanks and bettas you do have to be careful about the filter. So many filters designed for small tanks create too much flow for a betta. The best way to filter a small tank is with a sponge filter powered by an air pump. If you used a pump with three outlets, you could run three tanks off one air pump.

Apart from "proper" ie sold for the purpose plastic fish tanks the only plastic food safe ones I've seen are not that clear seem to  distort the fish.

I do have a large plastic food grade one which I will use temporarily if I ever get round to revamping the 54 litre and I have a tiny plastic quarantine tank but if you can't clearly see the fish I don't see the point in it.

Have you managed to find some that are really clear?