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-   -   Do you really need a pH controller? (http://www.plantedtank.net/forums/9-equipment/251274-do-you-really-need-ph-controller.html)

AlanLe 02-20-2013 02:26 AM

Do you really need a pH controller?
 
I know some people use the pH controller to achieve the desired pH and kH level in the tank. But isn't that defeat the purpose of injecting CO2 for the plants to photosensitizing?

Darkblade48 02-20-2013 03:30 AM

Having a pH controller will control the pH through injection of CO2, but will not alter kH in any way.

I'm not sure how having one would defeat the purpose of injecting CO2 for photosynthesis. However, that being said, a pH controller is not needed, though it is a nice luxury piece of equipment to have.

plantbrain 02-20-2013 04:12 AM

Quote:

Originally Posted by AlanLe (Post 2592642)
I know some people use the pH controller to achieve the desired pH and kH level in the tank. But isn't that defeat the purpose of injecting CO2 for the plants to photosensitizing?

We add CO2 for the plants, not for pH control (directly).
In other words, it's not some specific pH plants prefer.
It's CO2 that they prefer.

I'd say one out maybe 20-100 people use a pH controller, mostly newbies that bought everything(like myself way back when), and then try and justify it after getting stuck with it.

I use a decent pH meter and use it a relative measure.
I add CO2 for one reason, for the plants and they only use CO2 during the day. So I add CO2 only during the day.

dmagerl 02-20-2013 06:35 PM

Just what plantbrain said. I have one but dont use it. Maintaining that probe so it reads accurately is a real pain, constantly calibrating it, and its so expensive to replace and doesnt last all that long.

wkndracer 02-20-2013 10:00 PM

LOL but ya gotta luv forums because information abounds both good and bad.

Having used two CO2 controllers for almost 4yrs and currently running a third I picked up here on TPT probes are lasting me almost 2yrs and with a cal check every six months I don't find them hard to use.

American Marine Controllers, Pinpoint probes, softwater tanking here raising angelfish in 5dGH and 2dKH mixed RO. Used in water with a higher mineral content the reference junction could become plugged more often.

dmagerl 02-20-2013 10:29 PM

I had a milwaukee.

Out of the box it worked well. But after about 6 months, I would calibrate it with 4dkh and 7dkh solutions and then compare it against a liquid test kit and they never compared! They werent even close. My only thought was that if the liquid kit (I used multiple kits and they all agreed with each other) was that far off, there are thousands of people with ph problems in their tanks. So I came to the conclusion that the meter was off even though it calibrated well.

That led me to decide that the probe was bad and i wasnt ready to fork over roughly $50 for a new one after only 6 months.

Then the next conclusion was that if it was that far off, then my CO2 level was also off, so I just stopped using it. It wasnt worth the trouble.

wkndracer 02-20-2013 10:37 PM

gotta luv forums


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