sleepydoc
Team RC
+1 on brook or velvet. The 2nd picture looks like velvet, and the time frame is consistent with it.
To sanitize the DT, you can simply leave it fallow for 8 weeks. Velvet (oodinium,) like Ich (cryptocarion,) is an obligate fish parasite and will eventually die out if it doesn't have a fish host.
To sanitize the DT, you can simply leave it fallow for 8 weeks. Velvet (oodinium,) like Ich (cryptocarion,) is an obligate fish parasite and will eventually die out if it doesn't have a fish host.