learn from someone else on this
I ordered 30 pounds of pukani from BRS. cycled it for about 5 weeks. took a check on the phosphate level and it pinned my meter. had to use lanthum to cut down the phosphates, and still had some algae issues afterwards.
long of the short - awesome rock at an awesome price - either way, check phosphate or treat with muriatic acid to remove the outside of the rock, or treat with lanthum to remove phosphate.
We put dry tonga in a friends tank and he has been fighting phosphate ever since