Pothos are easy, keep soil moist, standard spectrum fluorescent lighting for at least 12 hours a day, and an organic fertilizer twice a month at the recommended rate. I use happy frog organic soil for my pitted ones, ABC vivaruim recipie for my planted tanks. Cocofiber will work, but you will need to fertillize once a week with 1/4 the fertilizer dose.
Snake pee probably won't harm these plants... They tolerate some pretty rough conditions and will probably thrive off the urea.
As far as the bleach goes, I soak the plants in rainwater overnight and spray the plant down with tsp per gallon vinegar solution, then rinse with water. This will neutralize most pesticides.
Biggest thing to remember is that repotting the plants into new soil every 6 months is required, as most soils break down and get loaded with excess minerals that can harm the plant over time. Soil is always changing, and keeping it fresh keeps the plant healthy.