Quote:
Originally Posted by
mauler http:///t/397664/converting-freshwater-tank-to-salt/60#post_3545442
That's where I thought it would go just wanted to make sure and yeah I'll check it out. And also what can you tell me about the reverse osmosis and overflow box?
Reverse osmosis is a water treatment procedure that removes dissolved contaminants in the water. Most typically, reverse osmosis is combined with deionizing cartridges to produce reverse osmosis-deionized water, abbreviated as RODI. It is important to use this kind of water because as tank water evaporates it leaves salt behind, so the salinity increases. To prevent this it is necessary to add water to make-up for evaporation. However, tap water, while having contaminant levels below toxic, if used to make-up for evaporation, will also evaporate, leaving the contaminants behind. Gradually, the contamination level increases until it becomes a problem. Tap water also has silicates and phosphates in it, which will support undesirable algae growth and diatom infestation. You can make you own RODI with apurchased unit, or buy at at some lfs as well as at WalMart. If you system is onb the large size I would spring for the RODI-genrating unit since the per gallon cost will turn out to be lower in the long run.
The overflow box is one of the ways to move tank water into an external sump. There are many types, each with its advantages and disadvantages. My large tank has bypassed the overflow box completely by having drains drilled out on the bottom of the tank (so called "reef ready"). My 40 gallon unit was not reef-ready, but I drilled a hole and fitted an internal drain that I got from glass-holes.com (they sell kits, drill bit, drain, builkhead fitting and all in kits). You can find overflow systems on almost any aquarium supply web site, including this one.