Apply in small amounts, product adds a lot of oxygen to water which can harm fish when too much is applied.Renew Cleaner is used to clear up planktonic algae. By highly oxidizing the water and essentially burning of the microscopic organisms that give the water a pea soup type of colour. Should not be used at the same time as Aquasphere Pro. For best results, apply Renew, wait 4 days and then apply the Aquasphere PRO and or Blast.

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