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post #1 of 8 (permalink) Old 10-02-2007, 03:21 PM Thread Starter
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New to Co2


Im new to the pressurized Co2 system. I was using a floramat with a diffusion bell and now ive upgraded to a pressurized system and i havent a clue how to measure how much is going in my tank. I have a bubble counter but im not sure what the recommended dose is. How many BPM should i be putting in ? and how is the PPM calculated ?
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post #2 of 8 (permalink) Old 10-02-2007, 03:57 PM
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It's too hard to say what BPm would work best for you, as this will be dependent on many factors. To determine ppm, there are a few methods commonly used. I prefer using a drop checker. There is also a kh/ph chart that can be used to estimate ppm of co2 that many use. You can also take a water sample and measure the ph, then let the water sit out for a day or so and re-measure the ph. A one point increase in ph is said to reflect 30ppm of co2, which is the recommended amount. Hope this helps

Mike


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post #3 of 8 (permalink) Old 10-02-2007, 05:30 PM
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From what I gather from your explanation you are trying approach this the right way.... off to a good start 'pressurized' BTW, then get the DC 'drop checker'. This method works very well and takes away the guess work associated with the KH/PH checking.

If you are looking for a DC reach out to Blacksunshine here. I have purchased a few from him and they work well...comes with the solution too. If you choose to get another I suggest you not try to make your own solution, even though it is possible its very easy to mess up the mix and you are back to square one...inaccuracy.


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post #4 of 8 (permalink) Old 10-02-2007, 05:36 PM
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1) Use a drop checker like everyone else said. Won't give you a precise measurement of what your CO2 levels are, but will let you know if you're in the correct range. A bubble counter will help. I have mine in the 4-5bps range, but yours might be different depending upon tank size, etc, etc.

2) Don't use a diffusion bell. It's one of the most inefficient ways. Look up some ceramic disc diffusers or an in-line reactor. Those two are the two most common ways of injecting CO2. If you want, you can also look up Mazzei venturi injectors which cost a bit more, but also do a fantastic job of dissolving CO2.
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post #5 of 8 (permalink) Old 10-02-2007, 06:11 PM
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I would agree that Blacksunshine's DC's work well, and inline DIY reactors work very well as a diffusion method.

Mike


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post #6 of 8 (permalink) Old 10-02-2007, 06:22 PM Thread Starter
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I bought all my parts on ebay.
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWN:IT&ih=015

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=320136972128

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWN:IT&ih=011

The drop checker i got came in the wrong box without a colour chart or instructions and the reagent bottle was half full.
I read somewhere that you put 5 drops of the solution in but read somewhere else that you put 3 drops in. Could someone help me out on this?

Also do i leave the Co2 running 24/7 or should it be turned off at night?
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post #7 of 8 (permalink) Old 10-02-2007, 06:24 PM
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DOesn't matter really how many drops you use in the drop checker. I put enough so that it's easily readable.
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post #8 of 8 (permalink) Old 10-03-2007, 04:04 PM
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the stuff you bought looks good

I've been running my Co2 24x7 for a couple of months now...it was suggested to me early on to do so for success with cetain plants that I have. Been doing it ever since.

I think most turn on an hour before and after lights out. In the end it's more important to have stable co2 when the plants need it so make sure your ppm's is up where it needs to be when lights are on


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