i kept a lima in a 75 gallon for a long time, it should be fine in the long run, and keep thinking about the future and college, you are in the same boat that i once was, your tank is over stocked, but feeding sparingly and doing water changes often...you are on the right track. As long as you keep up the work, your tank should be fine.... there is no right or wrong answer for this question, only opinions. Good luck with your tank, and do not let others discorage you in fish keeping and i think a car is more important then getting your dream fish tank, you will get it eventually, i know i did