I've got 2 Neptune DOS's as well as one DDR I'm not using. One DOS has been upgraded to John Guest fittings. Both DOS's have had new heads put on them within the past year. Asking $480 for the package, or I'll break it up as follows. $210 for the DOS with the JG fittings, $200 for the regular...
http://aquanerd.com/…/neptune-system-releases-flow-monitori…
Neptune is now releasing their new FMK (Fluid Monitoring Kit) for the Apex controller platform. Read more about it in the link above and watch the videos to learn even more.
We have added the new FMK (fluid monitoring kits) to our website and we expect delivery very soon. Click here to pre-order the FMK and FMK accessories and to watch the Neptune videos.
http://www.aquariumspecialty.com/shop-by-brand/neptune-systems