The Planted Tank Forum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
137 Posts
Discussion Starter · #1 ·
If I mineralize my RO with Potassium Carbonate to 1.5dKH (20ppm K). How much ppm of K would be dosed into my 40 gallon tank after a 50% water change? 10ppm roughly?

Thank you.
 

·
Banned
Joined
·
628 Posts
20 gallons x 3.785 liters x 26.85 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 5.24 mg/l K dosed into the tank after your water change.

EDIT: No wait a minute. Something is wrong with that. Sorry.

20 gallons x 3.785 liters x 44.05 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 8.60 mg/l K dosed into the tank after your water change.

That's my final answer. It could still be wrong though.

Bump that down to 8.60 mg/l K x 0.85 for displacement in the tank = 7.31 mg/l K

That's my final final answer.
 

·
Registered
Joined
·
2,140 Posts
20 gallons x 3.785 liters x 26.85 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 5.24 mg/l K dosed into the tank after your water change.

EDIT: No wait a minute. Something is wrong with that. Sorry.

20 gallons x 3.785 liters x 44.05 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 8.60 mg/l K dosed into the tank after your water change.

That's my final answer. It could still be wrong though.
Bump that down to 8.60 mg/l K x 0.85 for displacement in the tank = 7.31 mg/l K

That's my final final answer.
Lol in my own mind I saw your brow furrowing and the gears grinding 😆 I'm sorry, it just amused me. I love the detailed equations on this site, thanks so much for these!!
 

·
Registered
Joined
·
137 Posts
Discussion Starter · #4 ·
20 gallons x 3.785 liters x 26.85 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 5.24 mg/l K dosed into the tank after your water change.

EDIT: No wait a minute. Something is wrong with that. Sorry.

20 gallons x 3.785 liters x 44.05 mg/l KHCO3 in 1.5 dKH x 39.053% K in KHCO3 ÷ 151.4 liters in the tank = 8.60 mg/l K dosed into the tank after your water change.

That's my final answer. It could still be wrong though.
Thank you!
 
1 - 4 of 4 Posts
Top