started dry dosing, have a question. - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 06-06-2014, 12:57 PM Thread Starter
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Since I start dosing at the beginning of the week I been watching my nitrates because I ended up adding a significant amount of stock to.my tank this week.

Since then I have noticed ammonia is still zero and same with nitrites is zero as well. Nitrates been maintaining their level since the added kno3 all week. Around 30ppm.

I am assuming there is no need to add more kno3 right? I am assuming the added 8 kuhli loaches and 8 black skirt tetras and 1 3spot gouramis is what's keeping it up.

And if I stop dosing kno3 and keep dosing micro and kh2po4 do I loose anything from kno3 ?

75 Gallon Low Tech w/ Green Terror Pair

Last edited by Darkblade48; 06-06-2014 at 02:33 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #2 of 5 (permalink) Old 06-06-2014, 02:36 PM
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Since I start dosing at the beginning of the week I been watching my nitrates because I ended up adding a significant amount of stock to.my tank this week.

Since then I have noticed ammonia is still zero and same with nitrites is zero as well. Nitrates been maintaining their level since the added kno3 all week. Around 30ppm.

I am assuming there is no need to add more kno3 right? I am assuming the added 8 kuhli loaches and 8 black skirt tetras and 1 3spot gouramis is what's keeping it up.

And if I stop dosing kno3 and keep dosing micro and kh2po4 do I loose anything from kno3 ?
If you are sure that your nitrates are at 30 ppm consistently (calibrate your test kit to be sure), then you may not need to dose nitrates (or you could probably reduce it to 1/2 or 1/4 dosage, depending on your plant load).

If you stop dosing potassium nitrate, aside from losing nitrates, you will also lose potassium; this can be made up by dosing your potassium phosphate (or potassium sulfate, if need be).

Anthony


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post #3 of 5 (permalink) Old 06-06-2014, 03:01 PM Thread Starter
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Still planning on dosing kh2po4, that will provide the potassium right? Does that one increase nitrates too? Or just kno3? What else do I lose if I stop dosing kno3??

What do I gain beside potassium from kh2po4?

75 Gallon Low Tech w/ Green Terror Pair
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post #4 of 5 (permalink) Old 06-06-2014, 04:00 PM
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Still planning on dosing kh2po4, that will provide the potassium right? Does that one increase nitrates too? Or just kno3? What else do I lose if I stop dosing kno3??

What do I gain beside potassium from kh2po4?
No. The amount of potassium in KH2PO4 alone is not enough. If I remember correctly you are dosing half EI so you will only get about 0.4 ppm of potassium per dose from the KH2PO4.

If you have been dosing KNO3 then a nitrate level of 30 ppm is to be expected. Will the nitrates stay at this level if you stop? No idea. You'll have to see but I doubt it. I would personally continue KNO3 and keep an eye on the nitrates. If it continues to rise, reduce the dose until you have 10-30 ppm of nitrates.

IF you stop KNO3 then you can add 1/4 teaspoon of K2SO4 to account for the potassium loss by stopping KNO3. If you reduce KNO3 to say 1/8 teaspoon add an 1/8 of a teaspoon of K2SO4 as well to make up the potassium loss.

KH2PO4 supplies Phosphourus (as phosphate PO4) and a small amount of potassium. It does not contain any nitrates at all.

KNO3 supplies Nitrogen (as nitrate NO3) and a decent amount of potassium.
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post #5 of 5 (permalink) Old 06-06-2014, 04:06 PM Thread Starter
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Thanks for the info.

So far it doesn't seem to be dropping as usual. But like I said I have added a lot more fish and therefore more biowaste which means more nitrates.

75 Gallon Low Tech w/ Green Terror Pair
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