Lights On Or Off?

JamieXPXP

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i dont think if it makes much of a difference to have the lights on or off during the cycle. im not sure if it matters if they are led or uv
 

Rainbows and Fishes

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I agree, it shouldn’t matter whatsoever unless you’re attempting to use a bacteria in a bottle product in which case you’re supposed to keep the lights off during dosing. Otherwise unless you have plants I’d just go with whatever your preference is
 
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Phillip J. Fry

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Well, im asking bc the answers ive read from other forums vary
Some have claimed the light speeds up the process others claim it kills it. Though I havent used tetra safestart yet, the q&a post says uv lights kill their bacteria. Others have posted that they keep theirs on to help hinder brown algae growth. (But idk what lights they were using)
 

Rainbows and Fishes

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If you’re using TSS then the light will kill free floating bacteria, in no case will having the light on speed up the process as the bacteria you want do not require light to feed and grow. Also UV or not, you’re bacteria are safe within your filtration so the light won’t harm them once they begin to grow. If there isn’t light in your aquarium no algae will grow, as it requires light to photosynthesize.
 
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Phillip J. Fry

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If you’re using TSS then the light will kill free floating bacteria, in no case will having the light on speed up the process as the bacteria you want do not require light to feed and grow. Also UV or not, you’re bacteria are safe within your filtration so the light won’t harm them once they begin to grow. If there isn’t light in your aquarium no algae will grow, as it requires light to photosynthesize.
Thats what i figured. But the brown algae though....im confused about that. I read a thread (if I can find it again I'll post it) about someone doing a test on their tank where the brown algae was decreased by his led lights and this link (which i hope post well) claims "proper lighting" is a way to combat it. If that's true or not, what would the problem be if you have it?

https://blog.aquariuminfo.org/the-best-way-to-remove-brown-algae-from-the-aquarium/
 
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