SicceSyncra Silent 2.0 Multifunction 568 GPH Submersible Water Pump | Italian Made 35W Ultra Quiet Durable Aquarium Fish Tank, Fountain, Pond, Hydroponics, Terrarium Black | Freshwater & Saltwater

While the pump is not 'dead silent' in my application (as some reviewers say), it awfully quiet, and is a great little pump.I have mine in a 40g Sterilite tub I use as a sump on a 60g acrylic freshwater tank. The pump's hose runs out the tub and returns to the tank via a 45-degree PVC elbow that slips tightly into one of the 3/4" holes drilled into the top of the tank. I mention that because the PVC might be conducting some sound that would be absent if it were a soft hose at the return vs a PVC fitting. But if I turn all other equipment off, and just have the Sicce running, and press my ear against the tank (to hear what the fish hear), I get a low hum. However it's so quiet the bubbling of the return at the surface is equally loud and so it's not an annoying hum like previous pumps I've owned. (Just standing at the sump I can also hear a very low hum, but it's extremely quiet, especially for such a powerful little pump.)Pros: the pump is very small, does not generate heat, and has an efficient motor. In my case the head is about 4' but the distance to the return (horizontally) is another 5'. I have a 1.5" bulkhead (drilled tank), draining down 1.5" PVC into the tub and the pump keeps up perfectly with the overflow. A stronger pump would have needed to be dialed back. I couldn't have picked a better one for this application. Surface sits about 5/8ths inch from top of tank.I've used Dolphin pumps in the past which lasted some 17 years in constant operation, but when the last one died, I found this Sicce as I wanted a quieter pump. It has them beat for sure. I'd buy it again in a second. In fact I'd never buy any other kind of pump. It's been in operation now about a year and I can't remember now, but I think it's also self-cleaning. IAC I have never opened it, and it's working as effortless and perfectly as the day I got it. The Dolphin had a foam prefilter that needed cleaning every 6mo or so, even though it was in a very clean sump.If you need a great pump, this is the one. I've been keeping fish for 27 years and Sicce will be my go-to pump from now on, assuming it stands the test of time.

Great item. Not too big, able to pump a lot of water despite its smaller size. Used this as an upgrade to all my 32 gallon tank. Its very quiet and seems to keep junk from collecting at its base as some pumps have trouble with.

Pump is very quiet and does just what I need. The connector was a different size than my previous pump so I got it working and it is perfect.

I bought the 2.0 . It’s powerful and very quiet. After a week it stopped working. I bought a second one as a replacement. That ran for a day . I can get it to run for a little while if I unplug it and plug it back in. So basically I have junk.

This pump works as advertised. I am using this as a submersible pump within the 29 gallon sump of my 75 gallon reef aquarium. The pump is very quiet within the sump and behind the doors of my aquarium stand. I am using the provided suction cup legs placed directly on the bottom of the sump. I attached 3/4" I.D. flexible vinyl tubing to the outlet. The pump comes with an inlet attachment to allow mounting externally, however the pump casing is relatively light as compared to pumps that are built specifically for external use.

Great products. I have used them in Saltwater and fresh water for many years. They are great quality.

We have used this Sicce 2.0 pump on our son's aquatic turtle tank with an external media filter. This pump has stood up to turtle crud (they're not the cleanest of creatures) and keeps on running. It can be placed inside the tank, or outside as we have it plumbed and it really moves the water through. Once a year or so, we'll disassemble the pump (incredibly easy to do) and give it a quick wipe out. It goes back together effortlessly and leak-free. If this flow rate matches what you're looking for, we highly recommend it.

Not totally satisfied with this pump. bought 3 different sizes and each of them have an annoying buzz.