Dosing K2SO4 is raising my kh? - The Planted Tank Forum
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post #1 of 16 (permalink) Old 08-06-2012, 01:55 PM Thread Starter
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Dosing K2SO4 is raising my kh?

I have just started dosing potassium in my tank and I have noticed that my ph no longer drops as low as it did before. It also seems that i have a harder time dissolving co2 in my reactor. Are these related to potassium doaing?

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post #2 of 16 (permalink) Old 08-06-2012, 02:34 PM
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Quote:
Originally Posted by jstehman View Post
I have just started dosing potassium in my tank and I have noticed that my ph no longer drops as low as it did before. It also seems that i have a harder time dissolving co2 in my reactor. Are these related to potassium doaing?

potassium has nothing to do with KH or PH. your co2 isn't getting dissolved correctly as you said and that generally drops the PH.

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post #3 of 16 (permalink) Old 08-06-2012, 04:56 PM Thread Starter
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So then why would the day i start dosing potassium, my co2 just happens to have problems dissolving?
Coincidence?

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post #4 of 16 (permalink) Old 08-06-2012, 05:08 PM
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Originally Posted by jstehman View Post
So then why would the day i start dosing potassium, my co2 just happens to have problems dissolving?
Coincidence?

how much are you dosing?? whats your setup, give full details, again k2so4 has nothing to do with co2 or kh.

i had dosed crazy amount of k2so4 in the past with no effect on co2, kh etc.

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post #5 of 16 (permalink) Old 08-06-2012, 05:59 PM Thread Starter
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Only dosing 1/2 tsp. Been running co2 into a cerges reactor at 5the bps @30psi. Gh kh off the chart. Nitrate 5-10. Nitrite 0. Ammonia 0. Phosphate. 5-1.
125 gallon. Pea gravel substrate. Eheum 2217x2. Koralia 750.
Ive been getting a 1 point drop in ph every day for the past 2 months. Now i check drop and its not even. 5 point. Reactor is gurgling like mad. Even set timer to turn on 3 hours before lights, but i still cant get the co2 to dissolve. Somethings going on.

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post #6 of 16 (permalink) Old 08-06-2012, 06:24 PM
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Get a drop checker to see roughly how much CO2 is in the tank. There might be other things in the tank that affects the pH or your reactor/flow isn't that great.


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post #7 of 16 (permalink) Old 08-06-2012, 06:32 PM Thread Starter
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I dont have rhe equipment to make a 4dkh solution. Ive been doing the 24 hour degas test. Ph showed 7.6 without co2 and 6.6 with co2. Checked every day at same times. Now im getting readings of 7.0 with co2. Either im losing flow or my reagent went bad.

Nothing has been added to the tank.

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post #8 of 16 (permalink) Old 08-06-2012, 06:47 PM
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1/2 tsp a week, day?
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post #9 of 16 (permalink) Old 08-06-2012, 06:49 PM Thread Starter
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2 times a week.

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post #10 of 16 (permalink) Old 08-06-2012, 07:13 PM
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Quote:
Originally Posted by jstehman View Post
Only dosing 1/2 tsp. Been running co2 into a cerges reactor at 5the bps @30psi. Gh kh off the chart. Nitrate 5-10. Nitrite 0. Ammonia 0. Phosphate. 5-1.
125 gallon. Pea gravel substrate. Eheum 2217x2. Koralia 750.
Ive been getting a 1 point drop in ph every day for the past 2 months. Now i check drop and its not even. 5 point. Reactor is gurgling like mad. Even set timer to turn on 3 hours before lights, but i still cant get the co2 to dissolve. Somethings going on.

lets see a pic of your tank. you dont want your reactor to make the gurgling noise, if it does then there is a diffusing problem.

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post #11 of 16 (permalink) Old 08-06-2012, 09:03 PM Thread Starter
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72" 125g
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post #12 of 16 (permalink) Old 08-06-2012, 11:39 PM
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I feel the reactor or the flow throug the reactor is likely the culprit.

That or an adjustment was made to the working pressure or needlevalve. Has the temperature in the house changed lately?

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post #13 of 16 (permalink) Old 08-07-2012, 12:44 AM Thread Starter
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Working pressure is set. Azoo regulator. Maybe a crappy NV? I've been looking at a Fabco NV-55 for an upgrade.

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post #14 of 16 (permalink) Old 08-07-2012, 01:45 AM
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There is a recipe around here somewhere using kitchen tools (teaspoons, cup measures) that makes a decent 4dKH solution.
I'll see if I can find it, probably a sticky somewhere...

https://www.plantedtank.net/forums/sh...highlight=4dKH
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post #15 of 16 (permalink) Old 08-07-2012, 02:03 AM Thread Starter
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Thanks for the linky. I just flushed out the canister that was powering the reactor. A bunch of moss and junk came out under a backflush so we'll see what happens by tomorrow afternoon.

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