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Discussion Starter · #1 ·
I have a bunch of tanks in my fish room, all are low tech and at best, medium light. No CO2 in any shape or form. I have generic LED full spectrum lighting that's not geared for tanks, so no PAR readings.

I only want to dose 1x a week. I was using Zorfox to shoot for my goals, but it's giving me too much algae, so I'd like to lower my numbers to shoot for.

This is what I'm using right now, that's too much.

"Fish Tanks Fertilizer Instructions

Open desktop planted tank calculator on desktop.
Choose solution. 500 mL size and 2 mL dose and 10 gallons.
Dry fertilizer enter (each one at a time): KNO3, KH2PO4, K2SO4 and CSM+B.
Dosing method: Custom
Calculating for: Leave auto for what it chooses on it's own, or for CSM+B choose iron.
Concentration is as follows:
KNO3 is 6ppm = 93 grams
KH2PO4 is 1.2ppm = 16g
K2SO4 is 1-2 PPM = 3g
CSM+B is .15-.2ppm (remember to set for iron) = 22g

1 pump per every 10 gallons."

I need even lower parameters than this. What should I set it for? Half that amount, or will that not be nearly enough? Or should I lower possibly just the KNO3?

231 Posts
If you don’t mind me asking why do you need lower perimeters.
I would say cut everything in half and see what happens if you get a deficiency raise them back up.

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