I have 2 6055's now with no controller. I plan to add another ph and am thinking about the 7095 controller. Any issues with the 6055's and the 7095? Reason I ask is someone commented in reviews that there was a problem. Would it be ok to add one more pump to be controlled by the 7095 or should I go with two making a total of 4? This is on a 120g 4x2x2 tank. Any suggestions as to what pump or pumps to add? Going a little more into SPS but still want LPS. Thanks.