Hello

[D Curious]

No rilling and don't be afraid of loosing siphon I never lost it since I have all on sumps. Also safety features are there if you install correctly. The overflow box has to leave enough level on top to accommodate loss of siphon and the sump at the correct level in case if lost of power. See my picks in my prior post. Also Aqua-Link has some install videos. I lose power plenty of times over night and no issues in the morning when we get it back.

Videos

Chuck, thanks for the gift of this information about the Aqua-Link sump. I have watched a couple of videos. Super interesting. Do you use an internal or external return pump? Is it very noisy? I have found air pumps that are 10 watts and very quiet. I am happy with water sounds but try to minimize motor vibration sounds.

[danotaylor]

Andrew I have a twin sumps on my 500gal tank. It has 2 internal pumps. It is very simple to prevent a back siphoning overflow.
The overflow surface grill sets the water level in the main tank.
The stand pipe behind the overflow sets the water height behind the overflow, usually an inch or 2 below the overflow grill.
On the 1st fill keep the sumps empty and the pump/s turned off.
Fill the main tank, the tank will then fill behind the overflow and water will drain through the stand pipes and fill the sump.
Let the sump fill to within 2-3 inches from the top of the sump.
Turn the water off.
Put a sharpie mark at the water level. Turn pumps on.
The water level in the sump will begin to drop as water is pumped up to the main tank.
Mark where the water level drops to once it stops dropping.
This becomes the level you may fill to whilst the pumps are running.
This method will ensure that in a power outage water running down the drain pipe & back siphoning from return side will not overflow your sump & flood your house

[Charlyc11]

The last one I bought is the one on the first pic, the others are ok but over powerd and no need for that much. They are all 24 volts and extreamly quiet inside the sump no vibrations. The advantage also of the last one that I bought is the footprint, much smaller and you can control the flow on all of them. Also I don't use the input head they show on this pic it comes with cage stile head (third pic) that if you were to lose siphon it will still leave some of the media below water in the sump.

[Alexxxsv]

Chuck would we be able to have a sump filtration without having to drill the tank? Like maybe an overhang weir box?

[Charlyc11]

Chuck would we be able to have a sump filtration without having to drill the tank? Like maybe an overhang weir box?

That's what I was telling you the Aqua-Link complete includes the overflow box that does not need drilling. The only thing you need the return line like below.