The Official Asylum Reef Tank Thread

I did the hole in the water line trick but it caused a lot of salt creep, so I was glad when it clogged.

All great stuff but he needs to make sure he has the right size sump to set that up as otherwise, the tape mark will go on the floor with the water.

Not if you start with the sump full when the power is off. The level will go down from there (into the main tank) when you turn the power on, and will return to that level in the sump when the power goes off. It is so hard to explain things when you know what you mean and others have no clue. With a couple of little pictures I could make it perfectly clear.
I have a spare wet/dry filter a little larger than the one in the picture. Too big for my cabinet. It was just being used as a refugium, so I have no media for it.

[Blueface]

Originally Posted by BC-Axeman

I did the hole in the water line trick but it caused a lot of salt creep, so I was glad when it clogged.

Not if you start with the sump full when the power is off. The level will go down from there (into the main tank) when you turn the power on, and will return to that level in the sump when the power goes off. It is so hard to explain things when you know what you mean and others have no clue. With a couple of little pictures I could make it perfectly clear.
I have a spare wet/dry filter a little larger than the one in the picture. Too big for my cabinet. It was just being used as a refugium, so I have no media for it.

I am surprised at the salt creep. If you drill a very tiny hole and keep it parallel to the water level, going into the water level, there will never be any creep as it is not exposed to the air. You just don't want it exposed. Will try to take a shot of mine for illustration. I have had it like that for 12 yrs and never a speck of salt. Neither on any of my customers' tanks.

As it relates to the backflow, believe me, I know exactly what you are talking about as I always did that and showed customers how to do it.
I was just making light of it that honestly it won't work if your sump is too small. If the wet dry is too small, the tank will most definitely overflow the wet dry regardless of how you try to mark it as it is going to back up a certain amount of water that cannot be controlled as it determined by the tank size on tanks with built in overflow boxes. If you use a hang on overflow box, different story as it can be adjusted to whatever water level you want in the tank.