AdAndrews
Marine Enthusiast!
I HAVE A 15 LITRE BABY BIORB- COLDWATER, wondered what u would do with it?-
Throw it away they are pretty crap. Or turn it into a gumball machine.
It's only 3 gallons so for coldwater fish you have...no options. If you keep the fish in there that you haveyou will inevitably shorten their lives drastically and kill them. You could buy the heater for the biorb and have it as a tropical shrimp tank though. Some people will no doubt tell you to get a betta, but I am not one of them . I won't keep one in anything less than 5 gallons as I prefer a fish to have some sort of swimming space in it's permanent home.
Seriously, I'd say a tropical shrimp tank.
Plants-wise you could try low light varieties and see how you get on. Mossballs , Java ferns and Java moss should all work fine, and shrimp love moss so for a shrimp tank that would be great.
thats up to you but why are you on the forum as you dont care or seem not to want to take care of your fish
to be honest your just cruel simple