Condensation on cover.. effect lighting?
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Old 10-02-2013, 03:46 PM   #1
AquaAurora
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Condensation on cover.. effect lighting?


Don't know if this should be in lighting or equipment forum..
SO I have a "55" gallon set up and cycling with canister filter and Lexan polycarbinate (plexiglass) clear covers. I haven't put on the lights yet, (waiting for plants to arrive) but I notice a lot of condensation build up on the underside of the 'hood' (plexiglass covers). I cleared it off yesterday but it built back up over night. I'm not sure if this will effect light intensity? Should I lower my water level and spray bar another inch or two?
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Old 10-02-2013, 04:38 PM   #2
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a dirty glass cover or versatop will inhibit light penetration. Best to keep the cover clean. If you feel the spray bar is attributing to the residue collecting on the cover, redirect or relocate.
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Old 10-02-2013, 06:32 PM   #3
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Water deposited on the cover by condensation will not affect the amount of light penetrating the cover, but it might disperse it more. It is usually not an issue at all. There's no need to remove the condensation.

Water deposited on the cover by splashing action of the spray bar works the same way as long as it remains liquid. There's no need to remove it either. However, this water will leave mineral residue as it evaporates. This residue will block light, so you will have to clean the residue from the cover from time to time (like, once a week).

And, BTW, Lexan (polycarbonate) is not Plexiglass (acrylic).
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Old 10-02-2013, 06:33 PM   #4
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All water that splashes will leave stains.
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Old 10-02-2013, 06:40 PM   #5
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Condensation comes from the warm water evaporating and condensing on the cooler glass. This leaves the effect to change when the lights are on. Likely the lights will heat the glass?
It will likely change, whether it remains enough to block the light, it will still need to be wiped down at times to avoid a residue buildup.
Personally, I like much more air circulation over the tank top. When you start pumping in CO2 and there is little room for O2 to enter the water at the top, it can get too much for the fish.
Not saying it is a major problem but just another thing to be aware of in case you do want to do a different plan.
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Old 10-03-2013, 04:17 PM   #6
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Thank you for the feedback everyone.
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