Anyone ever diffuse a T5?

[Sponge]

And here's our numbers.
Top number is pre-screen.
Bottom number is screen in place.

View attachment 31345

Now I just need to find a T5 schedule, and maybe back up a bit on lighting times.

Looks like you nailed it. Great job. Glad you found a simple solution And I love your number overlay.

 

[Sponge]

Think I got it.
As suggested I went out and bought some black fiberglass window screen.
Initially I put it over the entire splash cover and PAR levels dropped considerably across the tank with the center of the tank dropping from 380 to 220 at the top rock level and from 220 to 105 at the sand.
So, looking at the PAR, the highest levels were in the middle third of the tank.
I cut the screen so that a piece fit over the mid 1/3 of the splash screen (and was about 1-2" in from each side).
Now center rock top is 300 as an average across the tank, sand bed is 200 average across the tank.
Happy with this. Thanks for the help folks!

And, Mr Sponge. When next we meet I'd love to discuss slightly larger (and sturdier) legs/stand for the unit.

View attachment 31343

If you get a chance. Take a pic of existing leggs and give me basic dimensions so I can see what we are dealing with.