Hagen Nutrafin Ph Low Range Reagent Refill A7811{L+7}

Nutrafin Ph Low Range Reagent Refill 18 Ml (0.6 Fl Oz), For Use With The Nutrafin Ph Low Range Test (6.0 - 7.6). Ph Levels Should Be Monitored Regularly As They Have A Direct Effect On The Well Being And Health Of The Fish.