Infestation... Or Not?

[soggy]

i've been cycling my tank for a week already. and in its initial period, there was only die off which i brushed off. now, the die off is gradually decreasing, but low and behold, i've found out that i'm housing sea spiders, worms (i've spotted 9 to this very moment mind you), and 2 slugs in my fish tank. i've heard that the worms are supposedly good for the sand bed. but i don't know about the spiders and the slugs. and before i forget, the bloody spiders never fail to leave a trail of their webbing. so ya, i hope i can get some answers. thank you.

[Achilles Tang]

Sea spiders do not throw webbings like their land cousins do.

It could be something else.

leave the worms unless they are longer than 10cm...

The slugs will die off very soon as they have very short livespans... if in doubt, remove them. Slugs as in nudibranchs?

[soggy]

i wish i knew what they were call. but they're stuck to the surface of my tank. that's all i can say. there're like these hair like stuff which are transparent hanging from my rocks.