Ok so I made the higher pH version alkalinity using the sodium hydroxide. I made 2.5 gallons worth in a 3 gallon water jug. A few days or a week after I made it; the solution ate through the plastic jug and spilled out everywhere... Luckily I was storing in my garage until I was ready to use it so the cleanup wasn't bad. My question is, what did I do wrong? I mixed it for probably 10 min; but there might have been some granules/sediment still at the bottom. I assume this is what ate through the plastic. Any suggestions are welcome!