EI Dosing help with no KNO3 - The Planted Tank Forum
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post #1 of 4 (permalink) Old 12-01-2017, 05:24 AM Thread Starter
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EI Dosing help with no KNO3

My tap water has all the nitrates I need (lucky me) so I don't add any when dosing. I'm getting my BBA cleared up by still having issues with some plant growth. Most of my easy plants grow really well. Loads of various anubius, a couple different crypts, a couple of mosses, several different buces, a few different java ferns. My s repens stays alive but only get about 2 inches tall with bare stems and small leaves on top. Other plants have just barely hung on or dissappeared I tried to get things adjusted properly without the KNO3 but I think I had levels wrong and have just recalculated. I was dosing 1 tsp K2SO4 and 1/8 tsp KH2PO4 and on alternate days 1/4 tsp CSM+b, not sure how I arrived at that but now as near as I can tell the KH2PO4 and micro level is ok (maybe a slight decrease) but should be using 1/2 tsp of K2SO4 I think that will provide the 5ppm of K that I'm missing by not dosing the KNO3. Does this sound right? I want to get this close and run this way for a couple of weeks to see if some of the plants that are struggling come around.


Some parameters.
92g tank calculating dosage for 80g
I think I have a strong medium light (It's an odd array of fixtures)
degassing water now ph usually around 7.6-7.8 right between the high end of the normal test and the low end of the high test. About a 1 point drop with CO2
KH & GH both 6
Temp 82 I'll be dropping it back to about 77 (ich is gone)
50% weekly water change.

I'd appreciate any input on these dosing levels.
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post #2 of 4 (permalink) Old 12-01-2017, 08:51 AM
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to keep it simple you can substitute KNO3 with K2SO4 1:1 if you need only K out of it.
be aware tho that nitrates in water supply might vary greatly depending on season.

cant wait the day you guys stop measuring stuff in spoons, rocks and bananas
dukydaf, dukydaf, Edward and 3 others like this.
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post #3 of 4 (permalink) Old 12-01-2017, 01:54 PM Thread Starter
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Thanks, I appreciate the response. Last night I tested nitrates and they were at zero. I've never seen that in my tank or tap. I immediately added some KNO3 and then dumped the fertz I had measured out and refilled my pill container with new mix with the nitrates. Then I realized that I had forgot to shake the bottle! I retested and got my usual high N. I've never seen where the tap doesn't have N, but I certainly keep an eye on it.

"cant wait the day you guys stop measuring stuff in spoons, rocks and bananas " Could you explain?
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post #4 of 4 (permalink) Old 12-04-2017, 08:20 AM
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Quote:
Originally Posted by Kubla View Post

"cant wait the day you guys stop measuring stuff in spoons, rocks and bananas " Could you explain?
ahh its just a friendly joke about imperial measurement system, ignore it
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