I'm not big into keeping fish but i do have one fish in a 5 gallon tank. The tanks inhabitant is a platinum gourami. I recently added a chinese algae eater to the tank but he bothered the plat gourami so much i had to remove him. I've had the plat gourami for almost 2 years now. Due the fact that i added the CAE, I was reading up on gouramis and saw that they could get larger than my current one which is about 2 inches, do you think he will get much bigger and need a larger tank or is this 5 gallon tank and one fish fine till i decide to stop keeping fish?