Geosapper questions

[Fluxion]

Mr. Sapp,

I have bee considering building a Geosapper for my tank. I have a few questions for you.

On thing I am worried about is the salinity creeping up over time. I know I can just add some more RO/DI water once a week or so to adjust the salinity. I was just wondering how big of a deal this really is. Does the salinity need to be adjusted once a week or would once a month be ok? I know in your article on the Geosapper you mentioned removing the same volume of water from the tank that you add to the Phyto section. I have an auto top off on my system and removing water will cause it to be replaced with RO/DI water lowering the salinity.

I don't have a fishroom so if I build one I would like it to go under my stand. I only have about 24" above my sump. I have plenty of room on one end of my sump but it wouldn't be able to siphon into the sump. Has anybody run one of these with a Peristaltic pump? Could it be possible?

If I modified the design to use a peristaltic pump to push the food through the Geosapper and controlled it with a Reefkeeper II or other controller, would the rotifers or brine shrimp expire in the tubing?


Should I dump the output of the Geosapper into the return section of the sump or the refugium? Will the return pump kill the rotifers and brine shrimp?


Thanks for any help you can give me.