Suction Cup & Silicone Plug for Cal Aqua Labs - Double Check

Cal Aqua Labs' Double Check series is the only all-glass dual-compartment CO2 checker that allows the user to accurately compare the CO2 level in your aquarium side-by-side against a standard...

CAL AQUA's Double Counter functions as both a normal-flow and high-flow bubble counter in one elegant design. Normal-Flow Configuration: For small to medium sized aquariums where CO2 bubble rates are...

The Double Counter ER functions exactly the same as the original Double Counter but has an external port for quick and easy filling. Over time, water level inside bubble counters will evaporate due...

Cal Aqua Labs' PEARL is a dual-compartment CO2 checker that allows the user to accurately compare the CO2 level in your aquarium side-by-side against a standard reference. The unique space-saving...

Cal Aqua Labs Substrex - Aquarium Substrate Clarifier The Cal Aqua Labs Substrex, is a long term substrate additive that improves the clarity of your planted aquarium, and reduces any clouding of...