Review on 🐠 Pawfly 1.6 Inch Hydroponic Pump Air Stone Bubble Ceramic Diffuser for Aquarium Fish Tank - Set of 4-8 PCS by Laura Thomas

Update: All 8 work great! They release many even bubbles for their size. The manufacturer replaced the original batch which had some issues and all work great! Great product and support - would have no hesitation in recommending them for hydroponics/aquariums. ---------- Initially most worked fine, 1 didn't bubble and some had a different resistance. The seller/manufacturer replied to my review (but it would be better to write to me as Revain doesn't show you the replies to your reviews/comments). They replaced them even though I was outside the return window when I saw the reply. Looks like they adjusted the manufacturing process and quality control before shipping to customers, so these are my air stones now!