Our pH adjustment solutions are specially prepared for use in hydroponics. They are extremely concentrated and care should be taken when in use. Our pH Down is 81% phosphoric acid and pH Up is 24% potassium hydroxide. Keep away from children.
IMPORTANT NOTE: We cannot send/supply pH Up and pH Down to any UK offshore destination including Isle of Wight, Isle of Man, Scilly Isles, Scottish Islands (Western Isles, Orkney, Shetland, etc) Northern Ireland, Republic of Ireland and Channel Isles. This is due to the International Maritime Dangerous Goods (IMDG) code.