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16-06-2009, 03:55 PM | #21 |
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just wondering how often do you need to change the solution in the co2 indicator?
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16-06-2009, 06:12 PM | #22 |
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the drop checker is slower to react
i believe if not wrong its take 1/2 hr or so to reflect the reading so dun be fooled by it. the co2 needed is also related to your tank temp. lower temp tanks like 25 or below = lower co2 dosage |
16-06-2009, 06:13 PM | #23 |
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17-06-2009, 10:51 AM | #24 |
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take out your drop checker from the tank, leave it outside tank for an hour. It should change to blue. If not change the solution
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17-06-2009, 01:56 PM | #25 |
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I am using the same drop checker from Dymax.
Ended up buying 2 because one of them came with a cracked drop checker solution which had dried up completely. From the literature that's available on the net (BarrReport.com), it seems it's better to have a KH solution with a fixed dKH instead of tank water for a somewhat accurate reading. For ~30ppm of dissolved CO2, the solution should be approximately at 4 dKH - I've mixed up a 500ml solution of 4 dKH based on the instructions given and cross-verified it with a KH testing kit. The response is slow indeed but it's sufficient to give an indication of any excess/deficit in CO2 supplementation. |
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