Prime by Seachem is good. It detoxifies ammonia and nitrite up to 1 ppm
for about 48 hours, and dechlorinates water. I have used it many times when I need to do an emergency fish-in cycle or when I accidentally caused a mini cycle in the tank.
Laying at the bottom indicates some sort of stress on the fish. If you can, try to add more oxygen into the water (air stone), or make sure there is lots of surface agitation. Red in their gills/fins because it indicates high levels of ammonia and/or nitrite.
Some fish stores may have media that has already been cycled. You might be able to ask for some media, or ask for a baggie of old gravel from them. It will have some bacteria in it, and help ease the stress of the cycle some.
I wish you luck and let us know how they do.