Miraclear cubes 50g pool clarifier tablet all water phosphate remover 
 
The Amazing Clarifier in a gel cap.  The original concentrated clarifier in a cube Lasts for up to 30 days .Includes added phosphate remover.   Can be used with all filter types.
 
Features & Benefits
Super concentrated Non toxic & 100% biodegradable
Keeps water sparkling for 30 days
No spill, no mess, no measuring
Removes stain-causing metals and undissolved particles
Removes phosphates
Does not affect water chemistry
Just drop in pump basket
Dissolves within a 24 hours pump run time
 
Dosage:  50GM cube treats up to 100,000 Litres