Who Gives A Fish Forums

If you're using tap, test it first. My local water's got 10 ppm straight from the faucet. Had to switch to RO with remineralizer.

Amazon Swords are my go-to for filling out the back of a tank. They're so reliable and easy to care for.

Amazon Swords are my go-to for filling out the back of a tank. They're so reliable and easy to care for.

My LFS told me Montis are low-light corals. Running cheap LEDs at 30%, 7 hours. 15-gallon tank, 8.0 alk, 390 calc, 0 nitrates. They're alive but not growing. Sounds like I've been underdoing it?


Yeah, that's sketchy advice. Montis aren't high-light acros, but they're not mushrooms either. Try ...

I second Vyro9's approach. My Montipora caps thrive under similar settings, 70% peak on Radions, 9 hours total. Tank's 30 gallons, 8.0 alk, 410 calc, 3 nitrates. If you don't have a PAR meter, observe the polyps—retracted means too much light, extended means they're happy.