Fish Netting for Tank Cover Thread

[Hermannsae]

I am planning my 180 gal tank and I read in many threads how to cover a tank so that “carpet-surfing” can be avoided.
I was wondering how much light will be “reflected” by different net-types.
So I did a little research. Here the outcome:

Test setup without anything: 1500 Lux

- Clear glass-cover 9mm thick (0.35 in.): 1400 Lux, or approx. -7% light reduction

- light dusty glass 9mm thick (0.35 in.): 1300 Lux, approx. -13% light reduction

- black “bird’s net” from Lowes, opening 15x15mm (0.5x05 in.), 2mm (0.08 in.) thick: 1350 Lux, or approx. 10% light reduction

- clear netting XN-0260, Material Polyethylene, opening 5.5x5.5mm (0.22x0.22 in.), 1.4mm (0.06 in.) thick: 1300 Lux, or approx. 13% light reduction

- white netting XN-2170, Material Polyethylene, opening 8x7mm (0.31x0.28 in.), 2mm (0.08 in.) thick: 1250 Lux, or approx. 17% light reduction

- black netting XB-1131, Material extruded HDPE, opening 6x6mm (0.24x0.24 in.), 2.5mm (0.10 in.) thick: 950 Lux, or approx. 37% light reduction

These are empirical collected results. Just a rough guidance.

Maybe others are willing to share there experiences regarding building nets/frames and how they are holding up under HQI and saltwater.

BTW, Industrial Netting was so kind to send me same hand samples.

[brycerb]

Why are the first two negative percents, do they increase the amount of light?

[DolphinLVR]

i think those are meant to be dashes

[Hermannsae]

Why are the first two negative percents, do they increase the amount of light?

Sorry, they shouldn't be negative.
Also, I think would be better in the "Do It Yourself" Forum. :eek2:
Can I move this thread?

Thanks!