Easy cartridge replacement — no tools required

at a fraction of the cost and without the plastic bottle waste

Easy maintenance: Simple assembly and filter replacement

to know when to changes filters and membranes

Rugged pre-filter at the base of the straw removes large sediment

Milwaukee pH600AQ Digital pH Pen gravity fed filter Easy cartridge replacement — noDIGITAL. SIMPLE. COMPACT. Over 200,000 people have relied on the Milwaukee pH600AQ compact pH pen tester to move from difficult to use and interpret pH strips to digital testing. SUMMARY The Milwaukee pH600AQ compact pen tester is specifically designed to help maintain aquariums and aquaculture. Keeping the proper pH improves results for aquarium fish and quality in a range of fish raised in aqulculture. Use digital accuracy to keep pH in your target