Help with tank flickering

[shadysreef]

I have two ai prime HD’s above a 55 gallon standard aquarium I just recently upgraded from a 20 gallon tall... the problem I’m having is when power heads are going (so all the time) there is a pretty bad flicker of light in the water .. this didn’t happen in my 20 and i am a photosensitive epileptic... so you can understand my quarrel is there any way to help that? If I lowere the trajectory of them it’s not as bad .. although the surface is moving it’s not very agitated .. so I’m kind of stuck

 

[Doctorgori]

Sorry about your condition, gheez this is a tough issue.
Are you saying its the LED “shimmer”?
or the surface agitation ?
if the latter, you point the powerheads downward or in such a way to minimize surface ripples... I point mine towards the bottom but I have a BB with no sand

 

[AdamD76]

I agree with doctorgori. Keeping you surface agitation to a minimum and maybe adding a diffuser to you lights would help.

 

[Simsung]

You could also get a T5 or a led strip and illuminate the tank from all angles, this should greatly reduce the shimmer.