Do you have instructions I can print out? I lost mine or never got them.

Yes, they are always available from my site, linked to the matching RO/DI system sold on this site:

Melev's Reef 100-gallons-per-day Installation Instructions - http://www.melevsreef.com/installation-instructions-100gpd-rodi
Melev's Reef 150-gallons-per-day Installation Instructions - http://melevsreef.com/rodi_150gpd_install.html