Testing E.I. Solution N03 Level - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 04-05-2017, 02:09 AM Thread Starter
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Testing E.I. Solution N03 Level

I tested 5ml of my E.I. solution just to double check it is mixed correctly, and it registered between 5-10PPM for nitrates. Is this correct, or is the tank water supposed to register 5-10PPM after I add the first dose? This is probably a very dumb question, but just want to make sure I have this done right, because I'm noticing some slow down in certain plants. The tank water says 0 nitrates.

I'm following this recipe (5ml / 10 gallon):
Dosing Instructions

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post #2 of 4 (permalink) Old 04-05-2017, 09:49 PM
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You should be testing your tank water after dosing, if you feel like you have to. That's the beauty of EI. Do you know what's in your tap water? I don't dose no3 after I do my weekly water changes because my tap is around 20-25ppm.

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post #3 of 4 (permalink) Old 04-17-2017, 05:08 AM Thread Starter
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Originally Posted by Dempsey View Post
You should be testing your tank water after dosing, if you feel like you have to. That's the beauty of EI. Do you know what's in your tap water? I don't dose no3 after I do my weekly water changes because my tap is around 20-25ppm.
I thought the idea was not to "test" for EI, because you can just do "whatever" and be a layman. The salt peter or whatever we call it, is dosed with a computer, so for me so it's accurate according to the motor, unless it has a mechanical failure. I have upped my dose to 2x what is recommended and the results are approaching perfection, although I also upped some other variables like light intensity and c02 levels. MY tap water is run through a RO unit, so I get about 5 gallons after wasting tons of water.

My original question is what nitrates level might or should be at end of week, because I'm doubling doses now and no bad effects except bigger TDS. When I test the solution it's 7ppm. In the tank it's 0 generally. Maybe this week I'll be shocked shrimp are still making kids.

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post #4 of 4 (permalink) Old 04-17-2017, 04:54 PM
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Part of the "beauty of EI" is supposed to be that you don't have to measure. Some like to, some don't. In my understanding of EI and the way I make up my solutions, it is to bring the tank up to a certain level. For example, adding 15ml's of my macro solution increases my tanks nitrate by 1.25 ppm and PO4 by 0.25. If I added them to a tank that was half the volume it would increase the nitrate level in the tank by 2.5 and PO4 by 0.5. The salts used in EI are very concentrated and it doesn't take a large amount to raise tank levels by a significant amount.

I think the accepted level for nitrate in a tank based on EI is 10-20 ppm. That doesn't mean adding 10-20 ppm but having an overall tank level of 10-20. If your water came out of the tap with 5 you would adjust dosing accordingly. But once again, the beauty of EI is that you don't need to measure and you customize it completely for your tank. Just following standard EI amounts and following a 50% weekly water change should keep levels in check, theoretically. Although some will debate that.

Personally, I still consider myself to be using EI although I dose significantly less than what many would consider EI because they don't get the point of EI. It isn't just to dump x amount of ferts into your tank and control them with water changes. It's to find what works for your tank by finding the amount of nutrients needed to keep your plants from becoming deficient. You can do water changes in whatever amount you want and as frequently as you want. Nothing about it is set in stone.

Last edited by Jeff5614; 04-17-2017 at 05:06 PM. Reason: ...
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