Okay, you'll need a thermostatically controlled aquarium heater (100-150 watt) and
thermometer. Your going to have to bring the tank temp up some or you'll be treating the ich for weeks. You'll also need an ich medication that contains formalin and
malachite green also known as Victoria green or malachite blue. "
Rid ich" is one brand but see what your fish store has that contains those two ingredients. You'll be dosing that at half strength because the loaches are sensitive to ich meds. Here's a good article that talkes about treating ich on loaches: Dealing with Ich - Loaches Online Forum
You're going to need to do a giant (75% to 80%) water change and
thoroughly vacuum your substrate just before you put the first dose in the tank. You also need to remove and throw away any carbon in your filter. You'll need fresh carbon to remove residual medication when the treatment is complete. K?
So
Heater-100 watt should be fine
Thermometer (if you don't have one)
Ich med
Carbon cartridge for filter (for after treatment)
I'll brb -in 45 minutes or so if any other questions k?