demasonii

I currently have a 20 gallon tank with a demasoni, yellow lab, tropheus duboisi, and bumblebee in it. All fish are juvies and I wanted to know how many I can keep in this tank. I will be upgrading to a 75 gallon, since this 20 gallon was free, but not for 6 months or so. Can I keep 8-10 babies...

I hear jewels are supposed to be kept inside a tank of 7-7.5 ph, but ive also heard that they can withstand and adapt to a regular cichlid tank of an 8 ph. Red jewels are one of my favorites among cichlids and im wishing i could put one in my tank which is an 8. Btw my tank currently has a...