Hydro-Logic Merlin GP Green Carbon Filter 77EC solution is used as

77EC solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/ppm probe

706128 & 706129)

LED display and humidity control (30%–90%)

Ideal for air movement from an air pump to air stones

Can produce up to 1500 GPD at 80 PSI or with optional booster pump

Hydro-Logic Merlin GP Green Carbon Filter 77EC solution is used asGreen Coconut Carbon Filters are the carbon block pre filter that will reduce chlorine, organic chemicals, VOCs, mercury, lead, PBCs, sulfur and heavy metals. #741604 is 20 in x 4. 5 in. #728845 is 20 in x 2. 5 in. #741646 is 10 in x 2. 5 in. #741656 is 20 in x 2. 5 in.