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EI or PMDD

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I use something in between - something more closer to EI, but measure-before-add. My tank's too big to flush once a week.

I maintain NO3 (w/KNO3) in the 5-15 ppm range. I'll measure a couple times a week and when it gets to 5ppm, I'll throw in 10PPM of KNO3, same sized spoon of K2SO4, and 1ppm of PO4.

Traces get put in 1-2 time a week.

It's working well - Tonight, I'm going to harvest a garbage-can full of various rotalas, dwarf swords, vals, etc...

- Jeff
 
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