Enjoy following your build thread, thank you for sharing
Wanted to add that gha is often part of the maturing phase of a young system. Think of it as teenage acne. It’s ugly! I chose to go the natural route with frequent wc, elbow grease scrubbing, more cuc and most importantly start adding pods & phyto religiously (taper down when gha disappears)....couple months. And of course, pay attention to phos and nit parameters...no big fluctuations.
This brings us to high phosphates. First, confirm your phos readings are high at various times of the day. (Example is high phos reading after pellet feedings.) Or if I’m hurrying through the test steps, yowsa, a high number appears...
When I had gha, phos/nitrate levels were 0-low, so I began dosing these litely.
If you add GFO to the system, be careful and go slow, very slow. Bottoming out from a high number means more trouble. ik, lol.
Are your phos readings consistently high?
Do you have a refugium and is it healthy?
Photos are always good for us visual learners.