JBL ProFlora pH Permanent Test

The JBL ProFlora pH Permanent Test is a ready-to-use liquid indicator reagent designed for use in drop checkers, permanent pH test chambers, and CO2 monitoring devices throughout the planted aquarium. The bromothymol blue-based reagent changes colour across the pH range corresponding to dissolved CO2 levels, shifting from blue at low CO2 through green at the target ~30 ppm range to yellow when CO2 reaches potentially harmful concentrations. JBL's formulation is calibrated for use with 4dKH reference solution to ensure accurate CO2 correlation. The liquid is supplied in a dropper bottle for precise dosing — typically a few drops per refill of a standard drop checker. Compatible with JBL's own ProFlora test chambers and all third-party glass and plastic drop checker devices on the market.