Planted Tank Guru
Join Date: Apr 2011
Location: Hamilton, Ontario, Canada
It's not in the ideal range, no. They usually like a lower pH in the 5-6.8 range.
With that said, some people have lucky raising them in a higher pH. As Soothing said, if they are doing ok, don't mess with it. The best way to lower pH is active substrate + RO water and that means tearing your tank apart, buying jugs of RO or getting an RO machine, etc. Also, what is your end goal, just to have nice CRS in a tank and if you get some babies and they are self sustaining, fine or breeding and getting the max out of them you can.
Since there are lots of hiding spots, I assume it's planted well and it's a nice planted tank with some shrimp?
20g platy, , 2 x 10g shrimp, 3 x 20g shrimp, 7.5g shrimp and 1 great dane/mastiff puppy.
Sump Pimp #2
My Tanks and my shrimps