High GH and PPS Pro? - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 04-06-2009, 01:12 PM Thread Starter
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High GH and PPS Pro?

I want to start using the PPS system but have a question on my water. Heres the background.
KH 4
GH 20
Nitrate 0
Ph 7.2 ( CO2 off for 48 hours.)
Ammonia 0
Nitrite 0
Phosphate .1
Readings taken with API test kits, the KH and GH with 2 different kits and a test strip.
This is in a 26 gal planted tank with fish that's been running happily for about 3 weeks. This was a do over so the old filter was kept running in a different tank and some water off the bottom of the old tank was added to the new to avoid cycling issues. The substrate is flourite. The aquascape is slate and quartz rock and African Mopani wood. My pressurized CO2 is usually on at about 20ppm but was off now to add a new fish.
My question is does my high GH matter and if it does how do I fix it?
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post #2 of 9 (permalink) Old 04-06-2009, 05:28 PM
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Don't add the Mg in the PPS system. It will only raise your GH. You may have trouble with some stems, but overall most will adapt to your water. Short of peat filtering, which will leach tanins in the water, you will always have hard water until you buy a RO filter or another method of filtration.

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post #3 of 9 (permalink) Old 04-06-2009, 06:30 PM
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GH isn't a problem. High KH can be a problem for some plants and fish. If you can get the water quality report for your tap water, and if it includes the ppm of calcium and magnesium, you can check to see if there is significant magnesium in the water. If not, you may still want to dose magnesium.

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post #4 of 9 (permalink) Old 04-07-2009, 03:21 PM
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Did you calibrate the test kits?
Does not sound like it.
Do this or do not trust the reading. Those are the choices.

I've had high GH for years without issue. How I dose or do water changes etc are independent:

GH is 24 and the KH is 11:





So it cannot be an issue due to high GH(fish, plants etc).
KH is another matter.

Most issues are with CO2 and assumptions that you have a certain ppm, typically, it's always less than you think. I've yet to see a single case where it was more than a test method indicated for a location in the tank.

This also is true for all dosing methods.

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post #5 of 9 (permalink) Old 04-07-2009, 06:26 PM Thread Starter
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I didn't "calibrate the test kits" but the readings from 3 kits of two different types were reading very close together. As to the CO2, I was wondering the same thing. My drop checker has 4dkh solution but it seems to be a crude way to measure it. Do you have a better method? Bob
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post #6 of 9 (permalink) Old 04-07-2009, 10:54 PM
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Quote:
Originally Posted by BobH View Post
As to the CO2, I was wondering the same thing. My drop checker has 4dkh solution but it seems to be a crude way to measure it. Do you have a better method? Bob
A CO2 meter is a better method but they are expensive. The other option is to gauge it by just watching your plants - but that takes practice.

Kathy

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post #7 of 9 (permalink) Old 04-08-2009, 02:48 AM Thread Starter
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If the fish are OK can you give the plants too much CO2?
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post #8 of 9 (permalink) Old 04-08-2009, 03:11 AM
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No

Regards,
Tom Barr




Regards,
Tom Barr
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post #9 of 9 (permalink) Old 04-09-2009, 01:55 PM Thread Starter
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Thanks.
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