In deed. I have a fugi purple that is very red on my other tank and no algae grow. I used to have PC that were near a year old and no algae either.
I use GFO in both my aquarium + micro algae and not overcrawding and that does the trick.
We must not forget that zooxanthellae are algae and that coral need them to grown, at least for photosynthetic coral.
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Originally Posted by chris88
The spectrum and intensity does change in various lighting bulbs but its not the major causes of an algae bloom. Algae will grow because there is an access of nutrients. You could put a ton of red over a tank will low nutrients and no algae will grow. In fact that’s what people are doing with the new fiji purple and ati purple plus bulbs, they are adding red spectrum. If you have excess algae growth you will have access nutrients (nitrates, phosphates, silica, etc). However, the added red and yellow spectrum will make a high nutrient tank grow algae much faster because algae use red spectrum very well for photosynthesis.
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