20L Using Tunze Reef Pack Problem With Flow

In my 20L, I have 2 Koralia #1's and a Tunze Reef Pack (Nano Skimmer and Filter). The problem is, I'm not sure if I have enough flow. Right now, I have 1 Koralia in the back right corner about 1/4 was down pointing slightly up and at the center front glass. My other Koralia is on the back glass 1/2 way down, off center also pointing at the front center of the glass. And finally my Tunze Reef Pack is in the back left corner up as hight as it can get, leaving a few inches below the unit.

One problem I'm having is that I have very little if any flow at all going under the Tunze. I was wondering how can I, or should I even have flow going under the unit. If I have to reposition the unit, I will, I just can't figure out at way to get good flow everywhere. I'll try to take a picture tonight for a better description.

I'm not sure if it is good or not, just does not look good to me. Coming from the FW world, I have an AC 110 on a 75 gallon rated at 500gph and the flow seems much more in comparison. I know I'm comparing apples to oranges, but the flow to me I though would be much more. I also have a Maxi 400 and 1200, I'll give a try in my 20L to see how much more flow it is.

Currently there is nothing in the tank except sand. Rocks will be added at the end of the week.

Full Tank Shot


Left Side



Right Side

Ok, I'll keep that in mind. With nothing in the tank, but water and sand right now, it does not look like much. I'll be adding LR this weekend. When I begin to add fish and corals, I'll see how much flow it really is. I have a Koralia #3 on the way for my FW oscar tank to help with the dead spots in there.

At least now I'll have something for comparison also.

I was wondering, do you use the little guard that come with the Koralia's. I took it off thinking it was restricting flow, but at the same time, I don't want a fish or coral to get close and injured.