phosphate in substrate detritus? - The Planted Tank Forum
 
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post #1 of 1 (permalink) Old 08-09-2020, 01:39 AM Thread Starter
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phosphate in substrate detritus?

Hi All, I'm new to the forum. I have a heavily planted tank with 3 large discus and am having ongoing phosphate problems. The main issue is that I get algae blooms and hence not optimal plant growth.

Here is my run down:

• Red Sea 250
• Illumamagic Blaze light
• Seachem ferts; minerals, iron, phytohormone, nitrogen (20ml each a day)
• CO2 - 3-4 bubbles a second
•aqua solum black humate substrate

• pH 6.6
•ammonia 0-0.25ppm
•nitrate 2ppm
• phosphate 5-10ppm!

If I change water every day and can get it to start coming down, but when I stop it just rises again. I've just noticed that if I disturb the substrate using a turkey baster, to suck up the large amounts of detritus (its black when going up the siphon), then the phosphate level shoots up!

Whats going on here? Is it just accumulation of fish waste in the substrate? What shall I do to get phosphate levels down and to stay down?

Advise greatly appreciated - this is driving me insane!

Chris
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#discus, #phosphate, #plantedtank, #substrate

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