Replacement Test Tubes with Caps (5 ml)

About
Spare clear glass test tubes with screw caps and a 5 ml mark, made to fit API liquid test kits. Swap them in when your old tubes get stained, scratched or cracked, since a cloudy tube can throw off the color you read.

Specs
Material: Clear glass
Marking: 5 ml
Caps: Screw-on, to stop leaks and spills
Fits: API liquid test kits
Syringe: Not included

Using It
Fill to the 5 ml line, add your reagent and cap the tube before shaking. Spares mean you can run several tests at once.

Photos from AquascapeGuide's Etsy shop, used with permission.

Information sourced from AquascapeGuide