Anyone Thinking of Dumping LEDS and going back to Halides

I rarely post anything.
IMO MH vs LED
They both works "just" !
It's like Windows vs Apple
My friends who got Windows are always trying to fix something I do have Apple computer and don't have to do anything. Same thing goes for LED constant adjustments or MH set and go.
Again this is just my 2 cents
Happy reefing
 
DavidinGA said:
Are bulbs becoming scarce?
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Depends on what you buy. With XM, I'm not sure many people buy them anymore. They were popular many moon sago, but interst subsided and production probably did as a result. Phoenix controlled the DE market and Radium controlled the SE market. Phoenix decided to restart production after interest became overwhelming. Like T5, there is a very select group of dependable products (Giesman and ATI) and halide is going the same way. With a lot of people switching back, you are starting to see a lot more hybrid fixtures and select companies to choose from.
 
Few months ago I have changed LED to T5. For the last four years (under leds) pH in the tank was oscillating around 7.8-7.9, dispite of the time of the year and the number of windows opened to get a fresh air. Now pH is 8.2 ...
 
fewponds said:
Few months ago I have changed LED to T5. For the last four years (under leds) pH in the tank was oscillating around 7.8-7.9, dispite of the time of the year and the number of windows opened to get a fresh air. Now pH is 8.2 ...
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And...whats the science behind that? Anyone?
 
DavidinGA said:
And...whats the science behind that? Anyone?
Click to expand...

Increased availability of light that is photosynthetically usable results in increased uptake of CO2 from the water. Increased CO2 uptake results in lower carbonic acid concentration in the water and higher PH.
 
mhucasey said:
Increased availability of light that is photosynthetically usable results in increased uptake of CO2 from the water. Increased CO2 uptake results in lower carbonic acid concentration in the water and higher PH.
Click to expand...
Cool. Good to know.


Lots of other variables I know, but...

Low pH issues can be caused by insufficient lighting.

High pH could be attributed to excess light.
 
mhucasey said:
Increased availability of light that is photosynthetically usable results in increased uptake of CO2 from the water. Increased CO2 uptake results in lower carbonic acid concentration in the water and higher PH.
Click to expand...

I'm just about to change from using solely LED to using an LED/T5 hybrid. my PH has been between 8.0 and 8.2, should I be expecting a PH increase now then?
 
kenpau said:
I'm just about to change from using solely LED to using an LED/T5 hybrid. my PH has been between 8.0 and 8.2, should I be expecting a PH increase now then?
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I would not bet on it. I have changed light sources numerous times with no effect on pH. The above post about pH increase due to a lighting is the only case I have heard of and I wonder if the lights are really the cause.
 
An increase of ph indicates an increase of oxygen levels and a decrease in co2. Caused by an increase of algae born in the water column. Due to an increase in the amount of light
 
power boat jim said:
I would not bet on it. I have changed light sources numerous times with no effect on pH. The above post about pH increase due to a lighting is the only case I have heard of and I wonder if the lights are really the cause.
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I wouldn't bet on it either, there are so many things that can affect PH, it's far to easy to blame it on lighting! My new light is going up tomorrow and its a lot more powerful than my existing lights so I'll be waiting for that PH rise......
 
power boat jim said:
I would not bet on it. I have changed light sources numerous times with no effect on pH. The above post about pH increase due to a lighting is the only case I have heard of and I wonder if the lights are really the cause.
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It can if he has enough algae, If there was little algae it would not make a difference. A increase in photosynthesis or increase in growth of algae due to more light sure can cause a rise in ph.

What causes a ph rise during the day?
Why do some people reverse light their fuges at night?

Lighting does not directly affect ph but does so indirectly. Matter of fact the biggest daily ph swings are caused indirectly by lighting if you think about it.
 
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shred5 said:
It can if he has enough algae, If there was little algae it would not make a difference. A increase in photosynthesis or increase in growth of algae due to more light sure can cause a rise in ph.

What causes a ph rise during the day?
Why do some people reverse light their fuges at night?

Lighting does not directly affect ph but does so indirectly. Matter of fact the biggest daily ph swings are caused indirectly by lighting if you think about it.
Click to expand...

All true, but all things being equal a change from one light source to another should not cause such a big jump in pH. There are way too many variable to consider before buying in to the program of saying MH keeps pH higher then LED. Not saying it did not happen but I would need to know way more about the tank and its details before I believe that theory.
 
I think the statement that was made about the New lighting and the old LED system not putting out comparable amounts of light is the key here. I had an increase of pH when I switched from LED to T5, but I attribute that to not having enough light output from my LED system.
 
mhucasey said:
I think the statement that was made about the New lighting and the old LED system not putting out comparable amounts of light is the key here. I had an increase of pH when I switched from LED to T5, but I attribute that to not having enough light output from my LED system.
Click to expand...


Exactly, no pictures, nothing said on the amount of light change...
 
Honstly I am a big advocate of LED light, however the facts I have presented about pH in my tank after lighting change, are the surprise for me. My led lamp was DIY project consiting of almost 200 of 3W cree and UV leds (6500K, 450nm, 475nm, 670nm, 420nm, 405nm) over 130 galon SPS tank. What can be seen on the picture below was essencialy grown under the leds. Now T5 is two ATI Sunpower with 12 x 39W in total

7kIDeiI.jpg
 
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