Ok, so I recently bought a fish tank, its a 3.5 gallon half moon tank, I a small decoration and a fairly tall and skinny artificial plant in the tank. I was planning on getting fish tomorrow, I already put in the quick start and had the water tested 2 days ago, there was no ammonia, but my PH levels were a bit too high to put fish in. I know my tank isn't that big, so I'm not looking for any kind of crazy fish that get big. I was looking at small danios or tetras or maybe all guppies since they live in groups, and a snail. I was told by the lady at Petsmart that anything over 4 including the snail would be overcrowding. The only fish experience I've had was a betta that lived for 4 years in a vase. I read on Petsmart's website about cleaning tanks but I'm not quite sure what they mean about a vacuum and changing water and adding this and that to the water…so again…I need help!