The PH out of my tap is 7.4, I have crushed coral substrate for my african cichlids and have had it that way for 2 years. You don't need any buffers, you should be fine with just crush coral substrate.
The PH out of my tap is 7.4, I have crushed coral substrate for my african cichlids and have had it that way for 2 years. You don't need any buffers, you should be fine with just crush coral substrate.