A friend wants rid of his malawi cichlids, all around 2" and said he'll give me them for free because he needs them gone asap. There are about 15 of them, ruti islands, yellow labs and kenyis. Would they be ok in my 3 foot, 30 gallon tank for a month or two until I buy a 55 gal? I have 25kg of ocean rock in the tank so there will be plenty of hiding spaces for them 