I know it hasn't been long but any update on the Pukani leaching PO4. I had that in my last tank but had the same issue. I ran way too much GFO and still had issues keeping PO4 down. This time around I ran Real Reef Rock and haven't had a single issue with PO4. Plus I didn't have to wait for coraline to grow.
It seems to be leaching PO4. I dose Phos free which drops it back down and then it comes back up after a few days. I am measuring with a Hanna ULR (736) and am keeping track of the numbers but don't have them right now.
I am glad to hear that Real Reef Rock is working out for you. :thumbsup: I was going to go that route, but I decided to buy live rock from Aquatic tech that has been "curing" for more than 2 months and they are picking me only pieces that are 100% coraline encrusted. They have been great to work with, very helpful!