Here’s something new to my tank-just in about 3 days, suddenly this! I’ve searched threads here and I’m still confused whether it’s good or not-so-good or terrible. The funny thing is, I’ve been adding CUC members over the last couple of weeks(since my longtime buddy the snowflake eel died)-snails, hermits and most recently 2 strawberry conchs, and they’ve been great at the usual algae cleanup...so what’s this and why is it here now?



