I'm still using the system pictured above on my coldwater system. It's very simple. Water just flows fairly slowly, yet continuously, through the refrigerator and up to the tank. The dosing pump and all the foods are located in the refrigerator.....the food never spoils this way. The dosing pump then delivers food to the feed line....which delivers food to the tank. I also vodka dose using the same system.
The system has been working flawlessly for about 18 months now. The cyclopeese can only be delivered in batches of less than a week....even 38 F is not cold enough to keep cyclopeese from spoiling. I usually manual dose cyclopeese and make up batches when I'm going to be away for a few days. All the Reef Nutrition line of products is kept and delivered at 38F and is pretty much "set it and forget it". I replace them when the bottles run dry( about 6 - 8 weeks).
The real trick though is my using a motorized three way ball valve that...during feeding time....just redirects the return pump's flow right back to the sump without going through the tank first. This way....the display tank is only circulated by the Tunzes......basically the water just recirulates within itself. The delivered food stays concentrated in the display tank for about 45 minutes.....when the motorized ball valve resumes normal operation and tank water is again flowing through the sump. Without this...much of the food would just get filtered out instead of eaten. The ball valve is controlled by my Neptune Aquacontroller.
