Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Yup, colonial hydroids is what they are. As you can tell, they pack a potent sting for such a small creature.
Only thing I can tell you is to try and manually remove them. You may have to actually cut away the part of the rock they are on to remove them. I am unaware of any natural predators of...
wsywyg means what you see is what you get. It is when a sight puts a picture of the actual specimen you are buying not just a generic pic of the species.
The hole on top of the standpipe is your air inlet for the drain line. This must be kept above the water lines at all times. This will help with adjusting the water level in your overflow box, if you block tis off your overflow will surge up and down and be really noisy.
The siphon break is...
They probably came in on the LR. I have them in my display tank and occasionally they show up in the sump. The majority of them are in the display though.
Whether they are fish larvae or mysids, they are a great thing to have as they are a sign of a healthy system.
Not to sound disbelieving, but are you sure they are actually fish larvae? Their movements look a lot like the movements of mysid shrimp.
Anyway you can siphon 1 or 2 out and get a better look at them?
I'm sure the temp was only 1 of many factors. I would also think that ammonia from the food laying in the water and starting to decompose, the PH has probably dropped from being closed up in the cup over night were also contributing factors.
Sorry for your loss.