Removing Live Rock

Randy Holmes-Farley · May 6, 2018

Almost any food grade or high quality sodium or potassium phosphate is fine.

For example:

https://www.amazon.com/Disodium-Pho...7&sr=8-2&keywords=food+grade+sodium+phosphate

or

https://www.amazon.com/Trisodium-Ph...7&sr=8-1&keywords=food+grade+sodium+phosphate

Once you get one, we can help determine the dose needed.

Deezill · May 6, 2018

ok so I just ordered the Disodium Phosphate FOOD GRADE 99% Min. Purity 2lb. This was the first item on your list.
I am feeding two to three times a day nitrates are good now but my phosphates are still undetectable. SO this should help.
I am hoping that the nitrates and phosphates nutrients stir something else in the water that will out compete the dinos I have.
ultra low nutrients is not the way to go. never thought I would say it but my tank was too clean. I no longer change my filter socks every two days. leaving socks in for 5 days also helps raise my nitrates.

Deezill · May 14, 2018

Ok guys I am excited my nitrates are holding good at 5ppm and my Disodium Phosphate finally arrived from amazon only 4 days late. How much of this stuff do I dose into my tank. My Hanna checker still says my phosphates are undetectable. I would like to get 0.12 ppm to ensure I reach my goal and at that point I will consider the tank polluted and my ULNS will be gone lol. So about that dosing any help? my tank size is 150 in DT 34.5 in sump for a total of 184.5 but due to rock displacement I have 131 gallon all together now this is an approximate guess but should be very close.

Randy Holmes-Farley · May 15, 2018

Deezill said:
Ok guys I am excited my nitrates are holding good at 5ppm and my Disodium Phosphate finally arrived from amazon only 4 days late. How much of this stuff do I dose into my tank. My Hanna checker still says my phosphates are undetectable. I would like to get 0.12 ppm to ensure I reach my goal and at that point I will consider the tank polluted and my ULNS will be gone lol. So about that dosing any help? my tank size is 150 in DT 34.5 in sump for a total of 184.5 but due to rock displacement I have 131 gallon all together now this is an approximate guess but should be very close.

Do you have a scale?

Na2HPO4 is about 2/3 (67%) phosphate by weight.

So if you add 1 gram to 100 gallons (379 L) of tank water, you will boost phosphate by 670 mg/379 = 1.8 mg/L ~ 1.8 ppm. Obviously that is too much.

If you make a stock solution of 1 gram in 100 mL of RO/DI (resulting in phosphate of 6.7 mg/mL), then dose 1.1 mL of that solution to 100 gallons, you will have added 0.02 ppm, which is a fine amount to add at once.

Deezill · May 15, 2018

Randy Holmes-Farley said:
Do you have a scale?

Na2HPO4 is about 2/3 (67%) phosphate by weight.

So if you add 1 gram to 100 gallons (379 L) of tank water, you will boost phosphate by 670 mg/379 = 1.8 mg/L ~ 1.8 ppm. Obviously that is too much.

If you make a stock solution of 1 gram in 100 mL of RO/DI (resulting in phosphate of 6.7 mg/mL), then dose 1.1 mL of that solution to 100 gallons, you will have added 0.02 ppm, which is a fine amount to add at once.

Well Randy its too late. I was very excited and dosed 1 teaspoon of the NaPo4 into 180mL of water that was way to much I now have phosphates. I actually had too much. My phophates went from 0.00 to 2.50ppm. I had to dose NoPox and turn on my GFO reactor to bring it down. I will take a reading tonight. I now know that with a 99% purity that 1 teaspoon was too much way to much. On a flip side nothing has died as of yet and the Dinos look to be receding. I will keep you guys posted. I did not know the NaPo4 was the good stuff lol.