Eggcrate tank cover subdues the light

[austinsdad]

Got a 75g bowfront Oceanic tank with PC moonlighting. 2 10Ks and actinic. Been keeping those tight fitting glass covers off the top. They fit too well. Anyway, I got on of those 1/4 inch deep plastic ceiling light grids this weekend, with I'd say, 1/4 inch openings. They look great and fit right into the recessed area that the glass normally seats in, but subdue the light a bit. I can see slight shadows on some areas of my rock now.

Should I be concerned? Got leather fingers corals on the bottom of the tank, pumping xenias at the top, feather dusters on the top and middle, and a deresa clam on the sand bed, all been doing fine with either the glass or nothing. Would like more coral and know light is needed. Should I just closely watch the current inhabitants and go for lower light corals in the future? Really don't want to go with MHs.

 

[austinsdad]

Also, the bulbs are 9 months old. Annual replacements? They are on 11 hours daily.

 

[fishfreek]

Yes replace the bulbs. I have found my PC bulbs fade out after 8-9 months. I have also heard that egg crate does have an up and a down side. Try flipping it over and see if that helps.

 

[austinsdad]

Thanks. I think I'll change'm at 7-8 months.