API pH Down 473ml 30B API pH Down Phosphate and Nitrate Free pH Adjuster 473ml Customer Rating  N/A Add Review Ask Question $22.95 Qty : < > Product Description Reviews (0) (View All) Questions (View All) Designed to lower the pH of aquarium water where a testing has shown pH to be at undesirable level. Features: Lowers pH and make aquarium water more acidic Fast-acting, colourless, easy-to-use and will not cloud or colour aquarium water Phosphate-free and nitrate-free, will not encourage algae growth 473ml Add Review There are no reviews for this product. Ask Question There are no questions asked for this product. Ok