Dosing Nitrate and phosphate

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CTFIREMAN

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I suggest that this calculator is a good one to use:


I recommend food grade sodium nitrate (or a little less desirably unless you measure potassium, potassium nitrate), and sodium or potassium phosphate. For the sodium entries in the calculator, use the potassium entry and just use a little less (exact dose isn't critical anyway).

I'm not a fan of the products sold by hobby companies that do not include any recognized purity grade on the product.

After battling low to zero nitrates and phosphates in my frag tank resulting in a devastating cyano outbreak killing about 100 frags, I took the advice to buy and suppliment sodium nitrate and TSP (havent used yet). Using the calculator on the planted tank website I dosed Sodium Nitrate raising my Nitrates to 5-7 ppm resulting in an immediate irradication of Cyano and rebounding of remaining coral health.

Now to my question : Without dosing the TSP, 4 days after dosing the sodium nitrate, my phosphates are now at .06. Is this from the natural break down for the nitrates? Is there a need to dose phosphates in a low nutrient environment or should dosing nitrates alone naturally fix the problem?
 

Piranhapat

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