Everything has to be gutted and sanitized (tapwater and distilled white vinegar). Freshwater bacteria don't survive in saltwater and that's not how the biofilter works in a saltwater tank anyways (Biofilter is held in the rockwork aka live rock as opposed to filter media).Craig.G said:Wondering how easy it would be to convert an established freshwater aquarium to saltwater. Would any of the bacteria survive?
As mentioned by David, I would strongly encourage you to spend a while researching first as it will teach you far more than any freshwater experience. Saltwater isn't necessarily hard (especially just for a couple of clowns) but it is good to take your time to learn how things are different between salt and fresh. RODI water vs treated Tapwater, use of a refractometer, How Evaporation is a bigger factor with saltwater since water evaporates but salt doesn't, API is generally inadequate for salt water testing, the differences between things like Live Rock, Dry Rock and Carribsea Life Rock and the Pros and Cons of each, Differences between Bubblers/Air Stones and Powerheads/Wavemakers, Frequency of Water and Filter Changes, Established Filter Media vs Established Live Rock, Can't pack saltwater fish in like freshwater fish.Craig.G said:I'm just trying to venture into the other side of the hobby. I've got 6 freshwater tanks at the moment and just looking to do something simple like a couple clownfish.