HOW SMALL IS LITTLE 1 INCH 2 INCH 3 INCH etc. if there under 4 inches then shure they should be fine just keep an eye on what you stockwith them because they will !!!!!!!!!!!!!!!! eat any thing they can catch they anly get about 10 inches max so you shouldent have to worry about it in a three month period ,,, i just got rid of 2 of mine today i bought them at 1 inch and in 4 months they grew mabe 1 more inch so in 3 months you shgould be fine