Swimming Pool Reagents & Hot Tub Reagents

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If you're looking to make sure your water testing method is as accurate as possible, you've hit the jackpot with OnBuy's range of pool and hot tub reagents! Boasting tablets, liquids, and powders alike, delve in and discover a reagent to suit your set up here - and thank us later! Read More >

About Swimming Pool Reagents & Hot Tub Reagents

Cleverly formulated to precisely test your water chemistry, a hot tub or pool test reagent is a must-have addition to your arsenal of maintenance supplies - and luckily for you, OnBuy's collection is overflowing with pool and hot tub test reagents alike! 

Spanning pool reagents and hot tub reagents designed to react and accurately report your chemical levels, you'll find an array of ultra-efficient reagent water testers here set to simplify your maintenance to-do list. Phew!

Or perhaps you'd rather go for an all-in-one reagent test kit? Packed with all the essentials you'll need to get started, a reagent testing kit can help measure everything from copper to chlorine - what's not to love?