I am using the same photo as before, but with new ratings. The fixture is 11" above the water and using 3 ATI Aquablue Specials and 3 ATI Aquablue+
After seeing this, I removed 2 of the bulbs, then slowly lowered the light over time. Today I added a fiji purple and a UVL Super Actinic, I'll add more readings.
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Bestsquirtdoll