You should not add certain pool cleaning chemicals simultaneously because they can react and cause dangerous chemical reactions.

Here are some examples:

• Liquid Chlorine and acid (such as muriatic acid or sulfuric acid)
• Shock treatments and acid
• Liquid Chlorine and algaecides
• Liquid Chlorine and shock treatments
• Liquid Chlorine and calcium hypochlorite (Granular Chlorine)

Waiting at least several hours between adding chemicals is vital to allow the chemicals to circulate fully and dissolve in the water.

• Dissolve chemicals separately in a clean bucket of water & pour into the pool
• Never add water to chemicals always add chemicals to water
• Never add chemicals directly to the skimmer box
• Always wait minimum 1 hour after adding chlorine before adding pH decreaser/acid
• Do not pour Granular Chlorine or Super Shock directly into the pool, wait at least 30 mins after mixing to add into pool
• Always remove your pool cleaner prior to dosing any pool chemicals
• Do not add Chlorinating products to pools with a high copper content. If high copper levels are suspected, test and do not add until levels are below 0.2ppm