Well, on a normal tank, changing 25% one a month will work.
However on a 10g nano, you will probably want to do them
more frequently.

Keep in mind that a smaller tank will suffer greater
parameter swings due to evaporation. You *MUST* add new
water daily to keep the salinity stable. I recommend RO/DI
water for all sal****er keepers, as it is pure and won't add
to nuisance algae issues.

You can buy RO water at the super market in 1g jugs for $.50
or less. Or at your LFS (local fish store) for .40/gal.

Hydrometers are actually pretty flakey, but I got the
impression you didn't want to sink a lot of money into this
setup. Preferably, you would want to use a refractometer,
which is a neat device that lets you look through it like a
telescope, giving you an accurate reading of sality, and is
adjustable when it needs calibration. I've used one for
about 2 years, and love it.

Marc




Kellbot wrote:

Thanks! Your site has a ton of information! And that bubble tipped
anemone is huuuuge.

This may seem like a silly question, but are all hyrometers the same or
are the aquarium/salinity ones different? I have a triple mass
hydrometer I use for brewing, is this the same thing?

It sounds like sal****er doesn't need the massive weekly water changes
that freshwater does, is that correct? That changes where I can place
my tank. My 30/40 gallon freshwater (its a strange shape so i dont know
the actual gallonage) takes 30% water changes a week... I would die if
I had to do that with buckets.


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