I have a 300 gallon reef tank that has been established for 7 years and I cannot get coraline algae to grow.
There is a wet-dry filter, 3 large powerheads, metal halide lighting, +400 lbs of live rock, countless inverts, 16 fish...
I have tried putting coraline encrusted rocks in the tank, purple up, reef chemicals, etc. I feel like it's hopeless!
If you have any tricks or tips they would be greatly, greatly appreciated.
Here are my water parameters:
: 0.3 ppm
: 20 ppm
: 130 ppm
: 400 ppm
: 2.5 ppm