January 20 2017 at 3:47pm
Thanks for the response. I need to make another batch of potassium nitrate and this time I will make it more potent so I'm not putting in a ton of fresh water each dose. Instead of 2 cups or RODI water per tablespoon of potassium nitrate, I might halve the RODI. As far as potassium, that's something I am also trying to dose. But even with the amount of KNO3 I am dosing, K hasn't increased noticeably whatsoever.
That is an excellent point about KNO3 driving down PO4. I've supplemented my fish foods to compensate for that already. I've been adding lots of pellet food (which none of my fish like). So there is a nutrient rich breakdown there. I also feed phytoplankton, Pohls Coral Vitalizer, Reef Chili, and soon Acropower at night when the lights are off. I alternate each night with a different food for the corals.
Someone asked me privately what I use to test my water chemistry. I have used the Red Sea Pro kits for many years. Its very cost effective and each refill of the reagents are spot on, batch to batch. I use the Red Sea kit for alkalinity, calcium, magnesium, nitrate, potassium, iron, and iodine. I rarely test for iron or iodine. For phosphate I use a Hanna checker, which I have been happy with.