I voted yes but use it very sparingly. Just a rare smallll tweak on the main system once in a few months or longer. I'm concerned that even with slow dosing and filtering for precipitated lanthanum phosphate ,some free lanthanum gets through and may precipitate where it may cause probelms for some animals. I prefer it for curing rock that is leaching PO4 in curing bin,though. I also use it for my separate leather tank once in a while.