Just an FYI, my buddy and I discovered that Seachem sells under this brand for ponds. It is the same products are Prime, Matrix, Clarity, Stability, etc. but in larger quantities for our larger tanks. I mean, you can buy a 5G bucket of prime if you want! Just though I would share, here is the Amazon company: https://smile.amazon.com/s/ref=sr_pg_1?srs=8464513011&rh=i:specialty-aps&ie=UTF8&qid=1533567956
