Koi Medic Salinity Meter by Trans Instruments Solar but be sure to add

but be sure to add a union as well so you can remove the pump for repairs etc

weighing 10% of the equivalent volume of lava rock

all while adding a large amount of oxygen to the pond

API® Pond AlgaeFix® is an algae control that effectively reduces many types of green water algae

Koi Medic Salinity Meter by Trans Instruments Solar but be sure to addRequires solution, which is sold separately The Eco Series Koi Medic Salinity Meter is a very accurate, easy to use salinity meter. Simply turn on, dip into pond, and LCD display will display salt content. Includes protective case. Includes (4) 1. 5V button cell batteries. Economical: auto shutoff feature, 150hr battery life, low battery warning Durable: drop shock resistant up to 6' height, water resistant Specifications Units of Measurement % ppt