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post #1 of 6 (permalink) Old 05-25-2014, 08:51 PM Thread Starter
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Phosphate question

Hey guys.. I use the EI dosing method..

one of the Dry Ferts that Im dosing is KH2Po4
1/4 of a tsp 3 days a week..

My tank is 75 gals and Im using Co2

My Phosphates are testing on the high end of the chart regularly..
i have some algae.. thread algae and a little bba on some of my slow growers

what would happen do you think, if I removed this from the rotation? Would I get enough P from the fish waste and stuff like that?

Thoughts?

75 Gallon Tank
High Tech Co2
EI method ferts (started 3/26/14)
4 Coralife 10k daylight bulbs - High output T5 - 54 watts (48in) 2.88 WPG
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post #2 of 6 (permalink) Old 05-25-2014, 08:58 PM
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I thought I read the dosage for PO4 was 1/8th TSP, 3 times a week, as opposed to 1/4 tsp. I run my phosphate in the 2-3 PPM range with 3-4 WPG. Good growth, and minimal algae.
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post #3 of 6 (permalink) Old 05-25-2014, 09:28 PM Thread Starter
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Foster I'll double check but I thought I had it right for this size tank. I can always try reducing and see what happens


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75 Gallon Tank
High Tech Co2
EI method ferts (started 3/26/14)
4 Coralife 10k daylight bulbs - High output T5 - 54 watts (48in) 2.88 WPG
Eco Complete Sub
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post #4 of 6 (permalink) Old 05-26-2014, 03:14 PM
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I found I needed to back off on phosphate but did not want to cut out potassium so added Pot sulfate to the ferts.
K2SO4
I also had to do the calibration check and found that my reading of the phosphate was way off. Test sets can do a job on us if they make us think we know what we are doing when we don't?
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post #5 of 6 (permalink) Old 05-26-2014, 04:52 PM Thread Starter
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Quote:
Originally Posted by PlantedRich View Post
I found I needed to back off on phosphate but did not want to cut out potassium so added Pot sulfate to the ferts.
K2SO4
I also had to do the calibration check and found that my reading of the phosphate was way off. Test sets can do a job on us if they make us think we know what we are doing when we don't?
I wonder if it's the test.. thats a good point.
is there a simple way to calibrate?

75 Gallon Tank
High Tech Co2
EI method ferts (started 3/26/14)
4 Coralife 10k daylight bulbs - High output T5 - 54 watts (48in) 2.88 WPG
Eco Complete Sub
bigbites is offline  
post #6 of 6 (permalink) Old 05-26-2014, 06:29 PM
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Quote:
Originally Posted by bigbites View Post
I wonder if it's the test.. thats a good point.
is there a simple way to calibrate?
https://www.plantedtank.net/forums/sh...ad.php?t=83545
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