Fertilizer for 180 Gallon Tank, plus 65 gallon sump - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 06-30-2016, 01:19 PM Thread Starter
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Fertilizer for 180 Gallon Tank, plus 65 gallon sump

Dry amounts to dose for 245 gallons, this is what I had worked out from someone about a year ago, but since tank was never setup never tried them. It looks like too much to me. Can anyone give me thoughts as to what the correct amounts should be?


The tank is 180 gallons, with a 65 gallon sump. It has HP CO2 and high lights.

KNO3 (approximately 3 teaspoons)
KH2PO4 (approximately 1/2 teaspoon)
K2SO4 (approximately 2 teaspoon)???
Plantex CSM+B (approximately 1.5 teaspoons)
Iron Chelate (approximately 3/4 teaspoon)

Mon - KNO3, KH2PO4, K2SO4
Tues - Plantex, Iron Chelate
Wed - KNO3, KH2PO4, K2SO4
Thur - Plantex, Iron Chelate
Fri - KNO3, KH2PO4, K2SO4
Sat - Plantex, Iron Chelate
Sun - 50% water change no dosing
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post #2 of 3 (permalink) Old 06-30-2016, 03:44 PM
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If you cut the above by 1/3 you should be in the ballpark, it is a bit on the rich side (sump included). Would skip K2SO4 unless you have issues with potassium.
Extra Iron might not be needed either. Start with only CSM+B and buy an FE kit. Wait one to two months after startup do your WC and check your FE levels mid week. If you have low iron levels you could use extra iron, doubt you will need it though.

Here is the best calc around for dry and wet ferts around.
Rotala Butterfly | Planted Aquarium Nutrient Dosing Calculator


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post #3 of 3 (permalink) Old 06-30-2016, 03:55 PM
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I agree with fissure for the most part. While the k2so4 is not 100% necessary if you have it dose it, no harm. As was said, most likely you wont need the extra iron chelate, but its nice to have on hand if you do start seeing some issues. Those numbers do look a tad high other than the CSM+B numbers.
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