what are these things???

[archer772]

They are a very nice part of your CUC

 

[suki1724]

Ummm.....what's a CUC?

 

[Ace25]

CUC = Clean Up Crew, ie. snails, crabs, shrimp, starfish, cucumbers, etc.

 

[suki1724]

Ha ha, thanks. I would have figured it out eventually, LOL

Now I have to figure out what to do with all of the different lights on my tank :y220d:

 

[FinFanatic]

I recently discovered some in my tank as well!
It's amazing. I've had my 100g for about 6 years and it seems like you learn something new everyday.