I cant say the same for my fronts I ve had them for 8 months and they are only 3 inches at the most .. I think its more along tank, fish kept with, and the params in the tank that might be the bigger deciding factor but my other africans grew alot fast then them in about 4 months my peacocks are already 4 and 5 inches. Anywho I dont see anything wrong wtih using a 48 for small fronts as a holding tank but like I said earlyer you would need a bigger tank within a year.. which as you stated isnt an option so you may be better off not getting it. If you could get a bigger tank Id say go for it.