Hanna pH Liquid 7.0 & 4.0 Testers Allow the hot mixture to

Allow the hot mixture to cool

100 UK Gallons)- 800g will treat a pond up to 10

Lava rock is a natural

Burtons Far Infrared Shower Media is crafted from premium ceramic materials and minerals

Hanna pH Liquid 7.0 & 4.0 Testers Allow the hot mixture toThe pH 4. 01 & 7. 01 buffer solutions in quick and easy to use 20ml sachets are the most popular buffers used before analysing samples. Ideal for those requiring an accurate acid or neutral reading. The single dose sachets are really handy with each sealed sachet holding just the right amount of solution. Each time a meter or electrode is calibrated using the Hanna sachets, it is like using a newly opened bottle of solution. 5 x 20ml sachets of pH 4.