Abalone Hydrometers & Refractometers such as in a canister

such as in a canister filter

and bioactive trace elements

Good choice for rimless tanks

High adsorption capacity helps remove organics

Abalone Hydrometers & Refractometers such as in a canisterAbalone are unique snails who have flattened shells with breathing holes in them. They are able to stick firmly to the glass or rocks so much so that to force them off usually damages them and causes their demise. They have incredible appetites for algae, diatoms and detritus and need a lot of food. Abalone may grow up to 3 inches or more. It should be placed right side up on the sand near the glass after acclimation. It is adapted to rocky habitats;