I found ammonia at the dollar tree.
I have also ordered it from Dr Tim's website. If you get it from there you will have a small bottle but it is concetrated to 2ppm per drop so it is easy to dose accurately. Hope this helps
I have also ordered it from Dr Tim's website. If you get it from there you will have a small bottle but it is concetrated to 2ppm per drop so it is easy to dose accurately. Hope this helps