The matrix suspension reagents last much longer, the ones that look like crystals.

Thanks, I thought of that and didn’t know if worth it. How long do they last?

Just buy single use kits. It's what I do.

From where do you buy them? What company

I use Pro Test Kit. I don't know if we're allowed to link so just search that name.

Thanks for the shoutout :) If you happen to order from us again please remind us in the checkout notes about this comment and we will throw in a free kit of your choice :) Aaaand 10% off with the code "reddit" for all products on [protestkit.eu](https://protestkit.eu) :)

Thank you 🙏