**Requires 2 per colony for a full size colony**
A slow release thymol gel. A natural treatment with efficacy rates ranged from 85% to 95% and an overall average of 93% even after thousands of treatments. Ease of use: requires 2 x 50 gm treatment trays per hive, with an interval of 14 days
For more information see the manufacturers site:
https://www.vita-europe.com/beehealth/products/apiguard/