I live in Atlanta, GA and we have super soft water. I'd love to add Rainbows into my planted community tank, but its a struggle to keep the KH/GH up. I'm using crushed coral in the filter and it's been able to keep the KH around 5 to 6. PH is around 7.4/7.5 typcially with rest of the water parameters being just right. Is the KH too low for something like bosemani rainbows or turquoise rainbows?
Sorry for the noob question, but i've never kept rainbows before.