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If you're looking for more corraline - check your magnesium concentration with a good test kit - most salt mixes are under 1000ppm, while target levels are 1250-1500. If your levels are low, you can use Epsom salts to bring it up - very cheap, and effective. I've found keeping my Mg high makes corraline grow like crazy.

It's really spreading pretty fast Max, I appreciate that tid-bit though, I had no idea I could dose with epsom salts The tank is barely 2 months old, so still very young and starting to mature a bit, you can look at my photos from December and see how white the rocks are and how purple they are now, so I'm very pleased with it's progress, I just cant wait to have the zoo's spread