Will a filter sock catch flatworms?

Im setting up a new tank and in the one I have already set up I have brown flatworms. I want to use some water from that tank to start the other one I'm setting up and I was wondering if a filter sock will catch all the flatworms, if I suck any up. I think the one I have is 5 microns.

 

It should be small enuff, however, using "used" water won't do anything at all in terms of your cycle, and guess what? You do run the risk of adding pollutants, flatworms and anything else the old tank has in it to your tank.

The water column in your tank is actually fairly free of bacteria, and certainly doesn't contain the nitrifying species you're trying to cultivate, which are benthic/demersal critters.

Bite the bullet and mix some water up...that's your best bet.

 

Mixing the water doesn't bother me but I have always read that using pre-established water or a live rock aids in getting the tank started. so instead of using a live rock from my tank I was going to use water.

 

It won't do anything lol. If you want to help the cycle alone by some Dr. Tims if you think that will help. (I'm dubious)

 

Just cycle it by putting food in the tank like you would if the fish were in it. But if you're adding the fish from the other tank, odds are you'll transfer most of the bads when you do.

 

This is how I've always done it. But the rock and everything I used including water came from the same tank. I didn't have a cycle, and probably won't.

 

Live rock or sand from a pre-established tank helps the new tank. The water does almost nothing and is not needed.

 

There may not be bacteria in the water column, but I certainly would use pr-established water (if available) when starting my cycle. The chemistry is pretty stable.

 

+1^^^ I've always used water from an established system when setting up new systems....at least some of it.

 

How is that any different from properly made up saltwater?