Yes. But my recommendation is to stop using tap asap. You'd be better off with even standard ro water from any water store. Tap has to many particles in the water that are not good. You will always battle types of algae because of the stuff in the water.
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It's not a count of how good your water is because some good stuff is there as well, good in respect to humans, not good for fish or corals. We to have great water in the 120 TDS mark right out of the tap but our city includes phosphates because it keeps supply pipes from decaying over time.
Sorry, IMO, if your not using TDS 0 water to make saltwater, then your longer term experience is not going to be good.
Tap water, maybe 5-7 months, then your simply going to have a big mess on your hands, do yourself a great favor, and get the $100 buck RODI maker ans a bucket.
This is a questions where the best answer is "none of the above". Get your own RO/DI unit and use that as your water source for mixing SW. You can use RO/DI water from your LFS, but it's really iffy. Always test it first to make sure it has 0 nitrated and 0 phosphates and very low hardness and carbonate hardness.
If you must use tap water (not recommended) you should use a water conditioner such as Prime and let the water stand for an hour or two before mixing your SW.
Yes. But my recommendation is to stop using tap asap. You'd be better off with even standard ro water from any water store. Tap has to many particles in the water that are not good. You will always battle types of algae because of the stuff in the water.
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Having an RO/DI unit will do wonders for water quality when it comes to mixing SW. In addition, if you ever get involved in very demanding FW fish, such as discus, you have a source of high quality water.