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Old 04-10-2007, 08:12 AM   #1 (permalink)
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Default co2 drop checker

I am about to change from fermentation co2 to pressurised. After reading the previous post I think I should probably get a drop checker also. Sorry to hear of the loss. Would someone please do a thread on how a drop checker works and include photos if possible. Do they require maintenance or once they are in they are good for a while? What happens when doing a water change and the water level drops below the drop checker?

Also on a related note, what about ph controllers? I see you have to use calibration fluid, how often does this need to be done?

Thanks, Brian
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Old 04-10-2007, 09:35 AM   #2 (permalink)
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Default Re: co2 drop checker

Here is a thread with a great deal of information on them

http://aape.naturalaquariums.com/for...hp?topic=759.0

Here is another one telling about the importance of using a known DKH solution in the drop checker

http://aape.naturalaquariums.com/for...p?topic=1111.0

Hope these help, any more questions feel free to ask
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Old 04-10-2007, 09:54 AM   #3 (permalink)
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Default Re: co2 drop checker

Thanks for the info! I will sit down and read.
Brian
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Old 04-10-2007, 10:29 AM   #4 (permalink)
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Default Re: co2 drop checker

Great read! Lots of good information. Thanks again goalcreas.
Brian
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Old 04-11-2007, 05:48 PM   #5 (permalink)
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Default Re: co2 drop checker

I'm doing the same thing as you, switching to pressurized, and my drop checker should arrive tomorrow. I went for the cheap red sea CO2 indicator, I can always get a pretty and expensive one later. I'm also going with the known KH water for the indicator, because I have REALLY high KH here in SE New Mexico. I really hope it works, because guessing is scary!

BTW, the solution in the drop checker lasts 2 weeks to 1 month in your tank, depending on who you ask. Kept separate, the KH water and the reactor fluid keep indefinitely.
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Old 04-11-2007, 06:53 PM   #6 (permalink)
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Default Re: co2 drop checker

imzadi - How come the solution once in tank becomes no longer reactive and must be changed? I'm getting a drop checker in hopefully next week to match up with the CO2 equiptment and ferts i have freshly aquired. I was thinking about that today, how could the fluid stay "good" or how long does it stay good?
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Old 04-11-2007, 07:50 PM   #7 (permalink)
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Default Re: co2 drop checker

according to this thread:
http://www.aquaticplantcentral.com/f...p-checker.html

you're probably good for about two weeks, but that's different for everyone. you could probably get away with a month or so before you have to change the solution. it just depends on much colour is retained in the solution, and if you're able to read the colour properly.
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Old 04-12-2007, 07:37 AM   #8 (permalink)
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Default Re: co2 drop checker

You can go longer, but it is so easy to change, why not just do it every time you change the water.
The price for the reagent is tiny and the time it takes is what 5 min tops. (probably more like 2 min)

If you are using a pre-made purchased solution for your drop checker water it may up the price a little, but you get 500ml, and you use what 2ml in a drop checker so you get 250 uses, and at $7 for the bottle then you are using 2.8 cents per use, and adding shipping might double it so you are at 5 cents.

Bottom line, why not change it and be safe?
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Old 04-12-2007, 04:30 PM   #9 (permalink)
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Default Re: CO2 drop checker

I have a question about the procedure to replace the known KH solution in the drop checker.

Should you just empty out the old solution and add some fresh solution or should you clean it with RO/distilled water and make sure that it's completely dry (no water in it at all) when you add fresh solution?

It seems to me that if some of the old solution is left in it, it might skew the validity of it's reading.

If the solution is replaced frequently when you do the weekly water change, it may have no effect on it's reading. Just wipe it out if you can and add fresh solution.

Also, if you clean it and you don't have it completely free of any water when you add fresh solution, it will definitely skew the reading.

Any thoughts? I haven't read anything about this.
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Old 04-12-2007, 04:45 PM   #10 (permalink)
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Default Re: co2 drop checker

Nahh you can go a few months between changing your soloution. I placed one of my DC's in my tank a couple months ago and if I haden't replaced the DC with one of my newer builds I'd still be using it.
500ml of DC regent would last you a VERY VERY VERY VERY VERY long time.
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