Made with 1/4" clear acrylic with a polycarbonate lid. Drilled for 1/4" tubing.

A clean single container to hold Alkalinity, Calcium and Magnesium for dosing systems.
Optional: add John Guest fittings and rigid acrylic tubing for $30 more.

Small holds 3g: 16" long x 5" wide x 12" tall holds 1-gallon of solution per zone. $175 (pictured with fittings/tubing upgrade)

Large hold 4.5g: 16" long x 5" wide x 17" tall holds 1.5-gallons of solution per zone. $215 (older picture; top is made differently now.)

Single lid access for easy refills. 

Email me for custom sizes.

Quad-zone doser also available for $275, as described and pictured in this blog entry: https://melevsreef.com/blogs/quad-zoned-dosing-reservoir