Definitely interesting! I have an Evergrow light fixture on my Reef as well. Normally I wouldn't be so upset, except it only presented itself upon making the switch to AF. Literally within the first 2 WC (30g / 20%) it started forming. So what I did was did larger WC thinking I needed to flush it out, besides everything that goes sideways is usually fixed with a WC. WRONG... I just put fuel in to the fire and it got worse to the point of stringy slime covering LR and corals.
How is your tank now? Did you switch salts and to what?
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300g Basement Reef - April 2018
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