Just picked up a sponge

[MT79]

You can also use a 2 liter soda bottle, or appropriate size, with the bottom removed, to cover the sponge in the tank. Squirt food through the top.

 

[melosu58]

Like I said that was what someone else said he did. Taking him out of the tank really bothers me. You might be better off with the plan Mike gave you as you wont have to remove him from the tank and risk air contact.

 

[lando]

You can also use a 2 liter soda bottle, or appropriate size, with the bottom removed, to cover the sponge in the tank. Squirt food through the top.

This is a great method for target feeding. I use it a couple times a week on my sun polyps...works great.