just got 2 today for free. a guy was getting rid of them.anyway they are about 1' long each. i put them in the biggest tank i got, a 75g. i also have a jardini aro and a ornate birchir. will this be a problem. i plan on getting a 120 gallon running in about a month. will this be enough for the jardini, birchir, and the cats. im a newb at large fish, but a pro with smaller fish. any help is wqnted