2 IDs needed

[crabgrass]

hi - I have been out of town for about 3 weeks and a couple things cropped up on the tank. Can I quick ID and recommendations:

1) Is a tube like thing. The picture I have attached is the largest and during the day it actually has some sort of web/something coming out of it. There are others smaller of these tubes, but not developed like this one. This grew next to a zoa

2) Is some sort of algea/netting/something that has been growing in the corner of the tank, next to the glass. There are other spots where I think i can see it popping up as well

 

[ISpeakForTheSeas]

1) Feather duster worms - harmless filter feeders.

2) Looks like a rapidly growing sponge - typically also harmless (and considered a sign of a healthy system by many), but some sponges can get invasive and/or overgrow corals. If it gets out of hand you should be able to manually remove it/trim it back with relatively little effort.

 

[crabgrass]

1) Feather duster worms - harmless filter feeders.

2) Looks like a rapidly growing sponge - typically also harmless (and considered a sign of a healthy system by many), but some sponges can get invasive and/or overgrow corals. If it gets out of hand you should be able to manually remove it/trim it back with relatively little effort.

Thanks! As always , this forum is great