xtmreef,
The only problem with overflows that use an Aqualifter pump (CPR Overflows) is that their overflows WILL FAIL without them. They are not an option ... they are a requirement.
CPR overflows do not use a simple U-tube, they have a HUGE weir. A weir I suppose is similar to a U-tube, but it's just enormous in comparison. Since it's so big, the speed of the water flowing through them is extremely slow in comparison and this encourages air to be trapped inside the weir. This air will accumulate and eventually break the siphon. This is why an Aqualifter pump is a requirement.
SoCalReefer,
The Lifereef overflows are extremely reliable and worth every penny. People who have had their overflows fail in the past would agree
The 'economy overflow' that I listed works fine too, but it was not complete in my opinion. I installed a
Durso standpipe inside of mine and that made it absolutely dead silent. Without the Durso it made slurping sounds that were unbearable. Other than that it has been rather reliable.
I'm just extremely happy to be rid of siphon overflows for good. Whenever I go out of town I'm concerned about the siphon and I always have to make sure that the U-tube is clean. Just know that with a siphon you are relying on a piece of equipment to transfer water to the
sump rather than simple gravity (with a drilled tank). $hit happens.
