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Discussion Starter · #1 ·
What dosing is suggested for medium light, co2 injected tanks? My 40 isn't really high light and I don't want to be adding too many ferts. I've got dry ferts to start but right now I'm finishing up my seachem line of nutrients. I was dosing 6x a week switching micros and macros. But I'm not sure that's even necessary. It seems my most limiting nutrient has been potassium since it's really been the only deficiency to show up after my tank was dosed every 3 days while I was on vacation. What regime is suggested for dry ferts? What do you suggest with finishing the seachem line? Thanks!

Planted Tanker
6,059 Posts
The easy way would be to just dose 1/2 or 1/3 EI levels for macros, 1/5 - 1/10 micros. This would probably be fine.

But if things are going well now and you dont want to mess with a good thing....

You can use a nutrient calculator to see how many ppms you are currently dosing, and dose the same amounts using dry ferts.

Rotala Butterfly | Planted Aquarium Nutrient Dosing Calculator

To figure the Flourish liquids, select "premixed" then the specific Flourish product from the drop dow menu.

Beside "I am calculating for" select the "result of my dose"

Beside "I am adding" enter however much of the product you are currently adding per dose.

This will tell how many ppms of each thing you are currently adding.

Then for dry ferts

Select "DIY"

"I am calculating for" -> "dose to reach a target"

For the target, enter the same ppm you are dosing now. It will tell you how much to use in dry ferts.

KNO3 = Flourish Nitrogen
K2PHO4 = Flourish Phosphorus
K2SO4 = Flourish Potassium
CSMB = Flourish Comprehensive (calculated for Fe)

*Note that KNO3 and K2PHO4 both provide some potassium as well. So when you calculate for K2SO4 (assuming you have this) subtract the amount already coming from the previous two compounds from your target ppm for K.

Hope that makes sense lol :)
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