reef tanks. A friend of mine owns a fish
store, and I used to buy RO water from
him at low cost. However, he just recently
moved and is no longer carrying RO water.
The next closest store is 45 minutes farther,
and the price of the water is double. I am
wondering if I can go to a grocery store and
use distilled water. Is it comparable to RO
water, or should I bite the bullet and buy
the more expensive RO water? Thanks so
much. I am looking forward to hearing
I would tend to lean toward
reverse osmosis (RO) water
versus distilled water only
because there’s a possibility that
the distilled water has been in contact with
copper components (e.g., pipes, condenser)
at some point in the distillation process, and,
as you’re probably aware, copper is deadly to
invertebrate life. If you can somehow confirm
that the grocery store’s distilled water is never
exposed to copper, it would be considered safe to
use in your reef system. Of course, ascertaining
this might be easier said than done.
Once in a while you can find water for
sale that is labeled as glass distilled, but I’m
wondering whether it might be more cost
effective for you in the long run to invest in
a basic RO or RO/DI (de-ionizing) unit that
you can hook up and use at home rather
than make repeated trips to a grocery store
to buy RO water by the gallon. If you have
very small reef tanks, it might be reasonable
to buy it by the gallon, but if you have larger
systems, it will almost certainly cost you
less in cash, time, effort, and gas to use a
home RO/DI unit. Moreover, if you have your
own RO/DI system, you can be certain that
it’s being maintained properly and that the
components are being replaced at appropriate
intervals—and therefore, that it is yielding
product water with the lowest possible level
of dissolved solids.
I hate to dash your hopes,
but this is a highly volatile
mixture of fishes, even for a
300-gallon tank. Of the three
triggers you listed, the Picasso triggerfish
Rhinecanthus aculeatus is the only species
I would recommend keeping with other fish
in the same tank—but certainly not with the
other triggers on your list. Large, equally
by Hydor is the complete line
specifically designed to create
and control water movement
and circulation for the well being
of marine and reef aquariums.
2 WAVEMAKER models
9 Koralia 12V
models to chose from.
• Super low energy consumption
(max 22W) pumps which means
less heat release.
• Many different programs to
customize and suit your
• Unique,patented magnet-suction
cup pump support.
• Propellor shaped rotor for
amazing flow (up to 3500 gph).
aggressive fishes, such as larger angelfishes,
wrasses, and surgeonfishes, would make
suitable tankmates for this species.
A smaller clown triggerfish Balistoides
conspicillum may (or may not) behave itself
in a community setting for a time, but it
will likely become highly aggressive toward
tankmates as it matures. Hence, this species
is best kept in a single-specimen tank. The
I recently acquired a 300-gallon
tank that I’m planning to use
for a saltwater aquarium. I
hope to feature all triggerfishes
(my favorite group of saltwater fishes)
in the tank. Would this tank be large
enough to hold a clown triggerfish, Picasso
triggerfish, and undulated triggerfish?
HYDOR USA Inc.
Tel. + 1 916 920 5222
Fax. + 1 916 920 5522
Tropical Fish Hobbyist www.tfhmagazine.com