Excessive Light or Not

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I have a Aqua mode 600 - 14.44 gallons or 65 litres, EI fertz and Co2 injection, furna is crypts and Blyax
Current running with 2 x 7 watts CFL tubes @ 4000k which gives me 0.969 watts per gallon
possibility of 2 x 9 watts CFL @ 4000K which would give me 1.24 watts per gallon
or I could use 2 x 11 watts CFL @ 4000k which give me 1.5 watts per gallon

Does 1.5 watts per gallon seem excessive your thoughts on how much lighting require would be helpful.

Cheer
Paul
 
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Bump

As per above,
2 x 7 watts CFL tubes @ 4000k which gives me 0.969 watts per gallon / 910 Lumens
2 x 9 watts CFL @ 4000K which would give me 1.24 watts per gallon / 1166 lumens
2 x 11 watts CFL @ 4000k which give me 1.5 watts per gallon / 1800 lumens

does the latter seem excessive -

Cheers
Paul
 
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Thanks Darrel

I does not want to get back my diatoms which I have been suffering from for years - since changing from 6500K (S.A.D Daylight tubes) to 4000k CFL my diatoms has gone.

Cheers
Paul
 

dw1305

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Hi all,
I does not want to get back my diatoms which I have been suffering from for years - since changing from 6500K (S.A.D Daylight tubes) to 4000k CFL my diatoms has gone.
I'm not sure.

I wouldn't have thought that the (relatively) small difference in colour temperature would have such a significant effect on Diatom growth, but I don't tend to get many Diatoms in the tank.

Why do you want to change the light? How is your Blyyxa doing?

I tend to have a more complete layer of floating plants with a brighter light. I don't have a PAR meter, so I just thin that by eye.

cheers Darrel
 
Joined
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Hi all, I'm not sure.

I wouldn't have thought that the (relatively) small difference in colour temperature would have such a significant effect on Diatom growth, but I don't tend to get many Diatoms in the tank.

Why do you want to change the light? How is your Blyyxa doing?

I tend to have a more complete layer of floating plants with a brighter light. I don't have a PAR meter, so I just thin that by eye.

cheers Darrel
Hi darrel

Always had an issue with diatoms only minor / medum and after reading a thread on here I change from 1x 11 watt 6500k 865 daylight (for SAD symdrome) and 1 x 11 watt 2700K 840 warm white , I was only using one CFL which was the 6500k, the tank should be running with 2 x 11 watts as per OEM spec.
So two week ago I swapped to 2 x 7 watt 4000k 840 Cool white CFL tubes and my diatoms has gone. Since then I have added Blyax which like plenty of light and under the right condition the tips turn redish colour - some leafs are melting atm but I put it down to its new tank condition different water parameters, but in the back of my mind could it be down to lighting so I want to add 2 x 11 watts 4000K @ 1800 lumes CFL but I dont want to induce the diatoms again - its nice to see a algae free tank.

Cheers
Paul
 

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