Okay, time for a reality check. What is your time frame and budget for getting a larger tank. I understand you are new to the hobby but this looks like you haven't been paying attention to anything the other users have offered as advice. Have you done any research on an Arow? What size tank will this fish be in within the next 6 months? Be prepaired for possibly 2-3 inches of growth per month. If others pick up on this threat, prepare to get flamed... 
