Review on 🐠 Eheim PHL207184, 4.00 x 6.00 x 4.00, Black: Superior Quality Aquarium Accessory by Alicia White

Well, like most DIYers, my main complaint was the air pump (any pump) noise. I've tried probably 95% of the ones on the market. Then I came across this one, made in Germany. CALM! FINALLY QUIET PUMP! Of course it's more expensive, but believe me, it's worth it. I took off a star, I would have given it 5 stars, but the bubble button adjustment, while it works, does NOT noticeably adjust the bubbles. What I'm saying is that as you turn the knobs to increase or decrease bubble flow, the result is ONLY noticeable from low to high and anywhere in between. I'm definitely disappointed by this and if the pump wasn't so quiet I would send it back. But I hand-crimped the air tube, put a needle on it, and it slowed the bubble flow where I want it to. So if you're looking for a really quiet pump that actually bubbles, you'll be happy. Just don't expect to adjust the bubble flow rate unless you're doing it manually.