Pondcare, MARS Pondcare 317163161708 Pondcare Ph Down Adjuster (16 Oz.) Review AuntWrecker April 14, 2018 August 4, 2018 No Comments on Pondcare, MARS Pondcare 317163161708 Pondcare Ph Down Adjuster (16 Oz.) Review This fits your . Make sure this fits by entering your model number. 16 fl. oz. bottle (473 ml) Treats 2 400 US Gal (9 085 L) 19 oz. PondCare® pH Down Adjuster (16 oz.)