Feed The Corydoras With Frozen Red Worm

After using the live tubifex worm for a long time, I feel very dangerous for my corydoras fishes. So I change the live tubifex worm to frozen red worm that bought from a reliable shop. So I feed the corydoras fishes with frozen worm every 3 days. For other days I feed the corydoras with algae and protein bran.
#corydoras