Aquavitro phosphorous

Ocelaris · Jan 28, 2018

So my local lfs didn't have seachem phosphorous, but that Aquavitro, which is the same potassium phosphate, but at 6,000 mg/L instead of Seachem's 4,500mg/L.

I'm trying to get from .02 ppm to about .06 ppm, can someone help with the math? Their site doesn't help that much, but I found this nifty calclator:

https://barrreport.com/pages/planted-tank-nutrient-dosing-calculator/

130 gallons total volume @ 6,000 mg/L (ppm) to raise it .04, that is about 1.1 mL? Does that sound right?

I don't normlly dose phosphates, but during the week when I can't get enough feedings in, phosphorous drops, so if I notice it down after a few days, I like to get it back up in the right range.

Thanks!

Ocelaris · Jan 29, 2018

So I dosed 2ml yesterday, did a water change of abou 30%, and today it was still around 0.02, so I said the heck with it and dosed 5 ml, and tested again and I'm now at 0.3! Whoops! Way over shot, but at least I'll know that low phosphorus isn't what's causing one sps to close up. It's probably a bit lower, as I didn't wait long enough to test, but that stuff is powerful!

ReefTeacher · Jan 29, 2018

3.29 mL should have gotten your 130 gal volume to go up by 0.04 ppm.

Randy Holmes-Farley · Jan 30, 2018

Ocelaris said:
So I dosed 2ml yesterday, did a water change of abou 30%, and today it was still around 0.02, so I said the heck with it and dosed 5 ml, and tested again and I'm now at 0.3! Whoops! Way over shot, but at least I'll know that low phosphorus isn't what's causing one sps to close up. It's probably a bit lower, as I didn't wait long enough to test, but that stuff is powerful!

IMO, 0.02 ppm phosphate is perfect.

Ocelaris · Jan 30, 2018

Being within the margin of error of zero worries me

Isn't the Hanna HI736 +/- 0.02? With my testing methodology, it's more like 0.1.

Ocelaris · Jan 30, 2018

So today I'm at 0.09, so not as dramatic as I thought, and I have some polyp extension as anticipated. I'm pleased at least with the ability to get phosphorus up if I'm bottoming out for more than a few days and the corals aren't happy.