What are the guidelines for how many Ghosties you can keep in an aquarium? Like, for fish it's 1 inch per 12 square inches of surface area, or some people go by 1 inch per gallon. I've heard no more than 8 in a 10g, but I am going to keep them with fish so I only have a little room left for them so I want to know how many I can get. Should I just count them as 1.25 inch fish (males are 1", females 1.5), or can they be more crowded? Oh yeah, and they should be fine with Guppies and Platys (male & female), right?