NPK Ratio

Jamie G · Post by **Jamie G** » Wed Oct 27, 2004 1:19 pm

ok seriously confused about all this
i ordered greg watsons pre-mix pmdd today.
how do i go about mixing it, and how much should i add daily/weelky to the tank.
i believe my parameters for all are at 0

Ghazanfar Ghori · Post by **Ghazanfar Ghori** » Wed Oct 27, 2004 2:43 pm

I really doubt that your NPK are all 0. Test the N & P.
Don't worry too much about the K.

What size is the tank? What lighting? CO2 system?
Fishload? Plant load?

Jamie G · Post by **Jamie G** » Wed Oct 27, 2004 4:07 pm

72 gal, 2x96 watts, pressurized co2, reactor, uv ster.
light fishload
medium plantload
gettin pretty heavy algae load

Jamie G · Post by **Jamie G** » Wed Oct 27, 2004 4:08 pm

ill dbl check the N, P, and K tongiht
but at last check i didnt get a reading.

RTRJR · Post by **RTRJR** » Wed Oct 27, 2004 6:37 pm

Some of do worry about the K - not necessarily do enough about it, but I do fret over it.

Ghazanfar Ghori · Post by **Ghazanfar Ghori** » Wed Oct 27, 2004 10:53 pm

What kind of algae are you seeing?

Jamie G · Post by **Jamie G** » Fri Oct 29, 2004 2:06 pm

well, my staghorn has gone away, now ive got fine strands that come off the crypts and the java, that seem to amass in a few days, so upkeep is a pain. also a fine 'threadlike' dark green that also feels like thread when pulling it off of stuff. i need to get pics of it all so i can get a better definition so you knwo what im talking about.

Jamie G · Post by **Jamie G** » Wed Nov 03, 2004 1:28 pm

i think most of my algae is hair.
i received Gregs PMDD Pre-Mix yesterday
How much of the mix should i i use
i think i used 1/4 cup to 500 ml of hot water, just about all the mix dissolved, but there is a bit in the bottom.
is 1/4 cup ok, too much, not enough ?
then how much of this is a good starting point to start dosing at ?

Jamie G · Post by **Jamie G** » Wed Nov 03, 2004 1:29 pm

also .. is there anything i should add to the premix ?
it already had boron included.

jcali10 · Post by **jcali10** » Thu Mar 27, 2008 5:29 pm

I'm struggling a little to understand this.

Using the Fertilator, the stock solution for KNO3 works out correctly: 4.59 ml of nitrate solution will give you 5 ppm of NO3 in 10G of water.

But when I plug the numbers in for the KH2PO4: 9.6 grams KH2PO4, 250 ml water, desired ppm .35, result is to add 0.49 ml of phosphate solution, not 1 ml for 0.36 ppm of PO4 in 10G of water.

But 4.8 grams of KH2PO4 and 250 ml water, desired ppm 0.35 results in a phosphate solution where 0.99 ml equals the desires 0.35 ppm PO4.

I see now, it looks like the amount of KH2PO4 was doubled, half the amount worked out correctly.

NPK Ratio

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