Are denitrifying bacteria photosynthetic in any way?

[cr500_af]

Setting up a 12 biocube for my daughter, and I'm thinking about putting a square LED unit I have over it. They are low power LEDs, but they look reasonably bright and have a nice color. PAR meter testing resulted in an almost nonexistant number... literally about 5 a foot away through open air.

My question is, in a FOWLR tank, would anything be negatively affected by the lack of PAR, as long as they (the fish) have a reasonably bright "daylight" period"?

 

[myvwrock]

well remember fish don't need light

 

[lilrobb]

That is highly debatable,
Humans need sunlight (UV radiation) for the production of vitamin E, and I know some lizards do too.
But my gut tells me that fish will do just fine...

 

[texhorns98]

myVWrock;530960 wrote: well remember fish don't need light

I think he's talking about the bacteria on the LR, and I would guess no, because plenty of people run sumps in the dark.

 

[weaglereefer]

I ran my Aquapod for about 3 months with 3 damsels and no light, only ambient light from my room. When I added a T5 fixture recently, I didn't notice a cycle or any issues, so I would think you're fine.

 

[myvwrock]

cr500_af;530959 wrote: as long as they (the fish) have a reasonably bright "daylight" period"?

thats what i was talking about

 

[cr500_af]

I was speaking about fish just from the aspect of their sleep cycle... I know they don't need light so much except for good color.

 

[tgray3]

"Are denitrifying bacteria photosynthetic in any way?"

I would say no. Most canister filters have a compartment for media where the bacteria can grow and it's in the dark inside the cannister.

As far as the fish go; i think it would be fine. I believe their "sleep cycle" depends on more than just light, moon phases, gravitational influences, seasons.....etc. I've read some threads on other forums where people with heat problems during the summer run their lights only at night and keep them off during the daylight hours with no adverse effects.

 

[cr500_af]

I never even thought about LR in sumps, canister filters, etc. I guess that answers my question. This is gonna end up being a really cheap build! :yay:

 

[mikesommers]

Light kills nitrifying bacteria. It likes darker areas and there for will be fine. I would say this is why it grows deep in the sand bed and in the rock.:up:



http://www.algone.com/index.php?option=com_content&view=article&id=158:nitrifying-bacteria-and-aquarium-health&catid=39:aquarium-filtration&Itemid=53">http://www.algone.com/index.php?option=com_content&view=article&id=158:nitrifying-bacteria-and-aquarium-health&catid=39:aquarium-filtration&Itemid=53</a>

Looks like you would be fine.

 

[rbredding]

LilRobb;530961 wrote: That is highly debatable,
Humans need sunlight (UV radiation) for the production of vitamin E, and I know some lizards do too.
But my gut tells me that fish will do just fine...

I thought it was vitamin D...

 

[smallblock]

Rbredding;531016 wrote: I thought it was vitamin D...

I was thinking the same thing lol

 

[mikesommers]

Rbredding;531016 wrote: I thought it was vitamin D...

:lol2: I missed that one!

 

[rolo65]

Maybe D and E are interchangeable in German.....

 

[lilrobb]

rolo65;531030 wrote: Maybe D and E are interchangeable in German.....

Yup thdy surd ard