I think you are on the right track with a large sump and an Ultima II 4,000. As far as Reeflo pumps, I don't think you can go wrong with them. My Hammerhead pump has been running for over 17 years now. The spare replacement pump is still in its box. I don't think you can buy Hammerhead pumps anymore. They are now Hammerhead/Barracuda hybrid pumps. I believe changing the impellers make them either a Barracuda or a Hammerhead (if my recollection is correct)
Most of the members on MFK now have smaller tanks, so there probably aren't many doing autodrip systems. Neoprodigy (founder and owner of MFK) did an article on his DIY 27/4 autodrip system. Perhaps his articles will have the info you are looking for:
DIY : 24/7 New Water Drip System
Water Changes... do you love doing them? Well I'm tired of the doing water changes every other day on 18+ tanks... The 24/7 drip system is a constant drip of "new" water and any excess water will overflow out the tank through the drains. Similar to a Overflow filter except it has a much slower...www.monsterfishkeepers.com
Here's his second article:
24/7 New Water changer (chemical Way)
in my old article DIY : 24/7 New Water Drip System it works great for chlorine. but when i found out about Chloramine in my water. That system will be useless when chloramine is in the water. So i start looking for NH2CL (Chloramine) Filters but it will leave ammonia in the water. and its...
Wishing you well on your big tank project.
Appreciate the linking of those threads
pacu mom
Did you ever get that 1,800 setup?
Who made it?
