Castle Hot Tubs

1kg Blue Horizons Phos Away



Blue Horizons Concentrated Phos Away is a dual action phosphate remover and controller, so can be used for prevention or cure.Phosphates are naturally occurring chemicals found in nearly everything, however as they are a very potent plant food, they are not something you want in your Swimming Pool water since they promote the rapid growth of algae. If your Swimming Pool keeps going green, you might have a Phosphate problem.Phosphate levels are measured in parts per billion (ppb), and ideal levels should be kept below 200ppb. Any level above this, and you may have a problem keeping your Swimming Pool clear.

Phos Away Usage Instructions:
  • If the pool has algae, follow your normal shock procedure to cure.
  • Check the pH level and if necessary adjust to the desired range of 7.2 - 7.6
  • Backwash the filter if necessary
  • With the filter running, shake the bottle well and add the required dose slowly via a clean and empty skimmer
  • Run the filter for a minimum of 24 hours after product application, backwash thoroughly to remove the trapped phosphates.
Phos Away Dosage Rates:
Water VolumesPhosphate Levels
LitresGallonsPreventative200-1000 ppb*1000+ ppb*
*Parts per billionIt is recommended that if your Phosphate levels are 100ppb or less, a preventative weekly dose of Blue Horizons Concentrated Phos Away is used to avoid future problems.Always read the instructions on the container prior to use.Supplied by Castle Hot Tubs, your number one supplier of swimming pool, spa & hot tub chemicals and care products.Confused about your water chemistry? Our guides answer the most Frequently Asked Questions!Why do I need to test my hot tub / spa / swimming pool water chlorine levels?Is it necessary to test my hot tub / spa / swimming pool water pH levels?Do I need to shock my hot tub / spa / swimming pool water?

Filter Details

Product Attributes


Bottom Hole Dimensions (mm)0-10
Bottom TypeFine Thread
Compatible Spa BrandEndless Pools
Compatible Spa Model735L
DARLLY Reference10501
FILBUR ReferenceFC-0134M
Filter Reference CodePC7-120
Part NumberJA35 / JA50
SC CodeSC704
Top Hole Dimensions (mm)71-80
Top TypeHandle
UNICEL Reference4CH-19

You may be interested in:


No Reviews added for this product.