the title pretty much says it all. im wanting to put a lima in a 75 gallon (w 18") and i know that wolnt be enough for a full grown, im just trying to figure out how long before one would outgrow that tank. if 3 or 4 years can be reasonably expected then i should be fine. im in college and cant get a tank any bigger than a 75 till im graduated unless something changes otherwise i would go for something like a 200 gallon. this is a bichir tank by the way. would these be compatible with each other?