Marcin’s Pico RFA tank

Yes I have seen the same model under different names, I got mine from my LFS so the H2Ocean was the name they stocked...

Only slight down side is that the small pump that comes with it doesn't fit in the opening of a 10l plastic water container. It may fit in a 25l I haven't tried. I bought a separate 5l food storage container i can place it in, fits better down the side of my unit too!
Yeah, the AutoAqua pumps are small for pumps but still pretty chunky for fitting inside containers. It gets worse with the AWC where there's three pumps (ATO, SW in and SW out) and one of them has to live in-side the aquarium! Plus those tiny 12v pumps pumps are kinda crappy and burn out really easily. I've actually replaced all the pumps on my units with small 12v diaphragm pumps from AliExpress.
They live outside the water and you just have 6mm tubing going into the resrvoir, connecting to the pump and another line going from the pump into your tank. Similar to a dosing pump but a little more robust and pushes more water.
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Just wired up a 2.5mm DC power plug to the pump and it plugs straight into the AWC or ATO controller and works seamlessly.

I'm 3D printing a small box to hold 3 pumps and designing them to be stackable so will print three boxes for my current setup 3 for the AWC/ATO on my 20 gal, 3 for the AWC/ATO on the 4gal Pico, an extra pump for the ATO on my quarantine tank, and a couple of spares in case I upgrade or add more systems. I find it easier than cramming the impellor pumps into reservoirs and small tanks, they're more reliable than the stoock pumps, move water slower (better for ATO on small tanks), and are less prone to siphons due to the diaphragm.
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I can't comment on many items here as I'm new myself! But for a small ATO try the one from H2Ocean. I have it on mine, great little thing! Optical sensor for the tank is tiny!
I was actually looking at the Coralvue hydros ato, looks like it’s the same thing as the H2Ocean. Seems like they look rebranded lol. But the hard part is, is finding a ATO container that would match my room
 
Green Clown Goby is in! Along with a few nassarius snails!

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Nice!! I dropped one of those in my 4 gal yesterday!! Mine is in full scaredy-cat mode hiding in the rockwork and I doubt I'll see much of him for a few days.
I had a Fire Goby in there previously but dang thing jumped out of the tank, even with a lid. Fire Goby's are Houdini's.
Green Clown should be much more stable.
 
Nice!! I dropped one of those in my 4 gal yesterday!! Mine is in full scaredy-cat mode hiding in the rockwork and I doubt I'll see much of him for a few days.
I had a Fire Goby in there previously but dang thing jumped out of the tank, even with a lid. Fire Goby's are Houdini's.
Green Clown should be much more stable.
Ah just like mine, super scared of everything, I think he’s eating…

sorry about your fire goby :(
 

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