I typically pour using 2 cups of plastic because the pot will eat 1/2 cup. What I mean is that there will be a half cup left in the pot that you cannot pour, just take it out and add it to the next batch of that color you are pouring. As far as coloring I use 4 oz bottles and they last me about a year to a year and a half. I typically add 1 teaspoon of heat stabilizer to 2 cups depending on what I am pouring and how long the plastic will be cooking but it is about 1 teaspoon, you are better off buying your heat stabilizer by the gallon. I also add a half teaspoon of softner to 2 cups of plastic to compensate for the half cup of cooked plastic you are putting back in the pot plus any cut offs, also buy it buy the gallon. I do not slowly heat my pot I put it on the heat I want. I noticed you have a small pour spout at the bottom of your ball valve, you might find out that it will clog up on you if you stop pouring for a minute or so. I would also put a lip around your stand so that the pot cannot slid off any side, take this from experience. I also got a squirel cage fan, built a box around it and attached it to a vent hood and installed it directly over my pots. Those pots kick out ALOT of smoke. I hope this helps and you are about to go through five gallon buckets like they are free.