I’m typing this as I fill my first 5 gallon. While I’m waiting you all email me lol I love you guys. Is Spectra good? Hmm let’s see, I just had to replace these filters and it’s been 6 years, granted I just have a 40 gallon breeder. Have a 210 in storage that can’t seem to get running due to a leak at the bulk head seal. Anyways both resins came vacuum sealed (very important) I have received bags from others that were not. Also thank you for testing each membrane and I like how it comes wet in the bag. I made sure to throw it in the fridge per you direction. Anyways I digress. Thank you spectra pure woot!!!