Pesticide Remediation Guide for BHO and Ethanol Extraction

When it comes to pesticide remediation, media selection and process control are everything. This guide explains exactly how to use Media Bros products to remediate pesticides from both flower and extract using either BHO or ethanol.

Media Bros Products for Pesticide Remediation

CRY

Lightest option. Effective for trace-level remediation (around 1–2 ppm).

CR41

Mid-level option. Contains 20% G-CRAC. Best for 5–20 ppm pesticide loads.

G-CRAC

Strongest option. Use for over 20 ppm or when CR41 isn’t enough.

Important Notes

• Do not reuse media. Remediation performance drops off after a single run.

• Remediate during initial extraction if possible. It’s significantly easier to remove pesticides from biomass than from post-processed extract.
  
  

BHO Extraction – Pesticide Remediation SOP

From Flower (Preferred)

• Extract as usual.

• Choose your media based on PPM levels:

• Less than 5 ppm: Use CRY

• 5–20 ppm: Use CR41 at 200g/lb of biomass

• More than 20 ppm or if CR41 isn’t effective: Add G-CRAC

• CR41 contains 20% G-CRAC. Increase G-CRAC incrementally until PPM levels are reduced.
  
  

From Extract

• Start with a G-CRAC to extract ratio of 0.5:1

• Adjust based on lab results. Most processors settle between 0.7:1 and 0.8:1

• Solvent ratio: Use 6:1 to 10:1 BHO to extract. More solvent typically improves flow and contact
  
  

Ethanol Extraction – Pesticide Remediation SOP

From Flower

• Use 150g of G-CRAC per lb of biomass

• Run the ethanol solution through a column packed with G-CRAC

• Ensure flow rate allows for proper contact time
  
  

From Extract

• Start with G-CRAC to extract ratio of 0.5:1. Adjust up to 1:1 if needed

• Ethanol to extract ratio should be between 6:1 and 10:1
  
  

Column Method

• Pack a column with G-CRAC

• Pass the ethanol extract through the column slowly

• Ensure there is enough residence time for the media to be effective
  
  

Batch Style Method

• Mix ethanol extract with G-CRAC in a reactor or vessel with an agitator

• Maintain a temperature of around 30°C

• Agitate for at least 1 hour

• Keep the media suspended—don’t let it settle at the bottom

• Optional: Pour the processed extract through a bed of Silica Gel 60A

• Filter out all media thoroughly. Ulti-Filter style tools work well here
  
  

Critical Reminders

• Residence time is essential. Do not rush solvent through G-CRAC

• It’s more effective to remediate at the biomass stage than from finished extract

• Never reuse media—it’s single-use for reliable remediation