API test tubes

[dudley]

Thanks, it sounds simple but convenient.

 

[steffish]

Here are some pics of the rack I made. Eggcrate held together with twist-ties/zip-ties. I offset another piece on the bottom to keep the tubes from falling through. Waterproof, washable, lightweight, handy, etc.
I also have a child's eyedropper for dosing meds or ferts that sits in there. You could make it to hold however many you want
.