I have the same item on order and am glad to hear that it works well. I have an Eheim 2224 and it has 1/2 hose just like your 2213. Did you need special adapters to fit the new intake to the Eheim hose?I have 1, I love it. It's really not rated for a large, strong filter. If you plan on putting it on a strong filter you will have to either shave, or sand the teeth or break a couple off to let the water flow through better, and prevent the skimmer from getting sucked down. I know it's adjustable depending on flow, but I've had issues with a larger filters.
I took my 2 off my 2026s, and put 1 on 2213, and it works great with that amount of flow.
Does a great job for keeping off surface scum.
I wish they made one for a stronger filter.
No, a little surface agitation can only be beneficial. CO2 loss is not a concern.I just hooked up the Fluval skimmer I ordered and it works great. It took me two minutes to hook up to my Eheim filter and within twenty minutes the surface of my 29 gallon tank was crystal clear. I was wondering how others felt about running it all the time. It causes a slight movement of the water surface and I am concerned I might be losing CO2. What do you guys think? Should the surface be completely still?