I have a 55g that I set up to house a Syn. Angelicus into which I introduced a few multies as dithers. I thought that the syn cat would eat the fry and keep the numbers down. Well, she is not doing her job and the numbers are increasing. Could I add a L. Malawi Dimidiochromis Compressiceps? My LFS has some that are 2-3in knowing that they can attain 12in and buffering my tank for L. T. is the upper end of the ph tollerance.