Our Clown Loaches might have Ich

We have two Clown loaches in a small community tank. We purchased them
about two weeks ago, and they have only rarely stopped moving since. I
noticed one of them brushing himself against a tank ornament just now,
and then against the gravel. So I moved in for a closer look. They
only rarely stop moving, but I was able to detect a few pimple like
spots on both of them.

In my previous aquarium keeping experience, years ago I admit, I only
found Ich if the temperature of the tank had dropped dramatically.
That is most certainly not the case in this tank in the heat of summer.
I think I've seen people cite Ich as the result of other stress
conditions. I did note that one of the loaches slowed down quite a
bit yesterday, and remained near motionless in a corner of the tank for
sometime. When I turned the tank light off, the sedintary loach
started "dancing" with his tank mate again. I took this as a sign that
I had been leaving the light on too long, and motivated me to plan a
trip to the LFS today to buy something(rock like) for the loaches to
shelter themselves under.

Is it possible that the lack of shady shelter, there are some live and
artificial plants in the tank, could cause the Ich inducing stress?

In any case, I have a small 8-10 gallon tank with a couple of little
angel fish and a Chinese Algae eater. I'm thinking of moving the Angel
Fish, and dropping the loaches in the little tank with the Algae eater
for a sort of hospital tank. Back in the day I successfully treated a
silver dollar with Ich with some kind of Blue drops. I'm guessing that
there is something similar, or the same, available today.

Any help is appreciated.