I haven't used the fizz tabs though, so can't comment
on them. You would actually be better to put him back in
the main tank and then treat everyone. Ick will appear on
fish when they become stressed. Based on your tank levels,
it looks like it's still cycling? This will cause stress in your fish
and then ick will show up. Here's my pre-typed response for ick.
To deal with ich you'll want to get a heater and raise the temp
to around 80*f. Make sure to have adaquate aeration in the
tank when doing this. Higher temps equal lower oxygen levels
in the water. Then you'll want to turn off the light on the tank
and cover the whole tank with a towel or blanket. On every
3rd day you'll want to gravel vacuum the bottom of the tank
to remove any dormant ich particles in the gravel. Along with all
of this you will need to either:
1) medicate with a product containing malachite green
such as Rid Ich+ found at your local fish store
(Petco, Petsmart etc.) Make sure to remove any carbon in your
tank, it'll absorb the meds rendering it uneffective.
OR
2) treat with salt, add salt to a total of 3 tsps per
gallon in increments of 1 tsp per gallon every 12 hours.
Use any salt which does NOT have anti-caking agents in it.
Dissolve it first in a container with a little tank water
before pouring it in.
Remember when doing water changes to add enough salt
for the amount of water that was removed. With the water
changes use water closely matching the tank temp and add
a dechlorinator appropriate for the amount of new water going
into the tank.
Keep up the treatment until the fish has been completely
ich-free for at least 6 days (which might well take a
couple of weeks)
If you have any questions, feel free to ask.
