par reader

I have a Apogee MQ-510 par meter for sale. i order in amazon June 10, 2022 and i paid 631,00$ i have a proof of purchase. Used for a week and decided to sell after some unexpected bills came up. $430 shipped Absolutely nothing wrong with it. Hit the power button and it reads par. come with...

Hello everyone! I work for a public aquarium and we are near the completion on a tropical butterfly house. Seeing as we will have tropical plants and being aquarium with coral systems, I was wondering if anyone had any recommendations for a par reader that will work out and in water? Does the...