Good and reasonable price for a Auto Top-Off unit

[mavjoy]

I'm looking around for a easy to use, not too expensive way to top off RO/DI water to my RSM tank. Anyone has any kind of DIY mods with their auto top off device with pics are very much welcome to drop a suggestion. Thanks.

[jewbilee]

I just made one of these last night... The only thing I need now is a float switch but it works like a charm!

http://www.nano-reef.com/forums/index.php?...hl=auto+top+off