You're right, and it's even more noticable now. The hair algae grows much better on the right side. I'll try to get a pic later. Any idea how long it will take to recover?Very good example to illustrate how a lower kelvin bulbs (right side) will contribute to a higher reproduction of algae comparing to a higher kelvin bulb (left side).
Bring the fixture up, that's too close.
Try 6 hours a day so the system can recover.
Those fixtures are small and designed to concentrate the light right below them. The higher they are placed the better chances you will have using them over that system.
Double ended bulbs have more punch, specially with those fixtures so close.
This is also great to show people that proper halide gear needs to be chosen for the right application.
Look like the LED fixture on the far right is also toasting there!!