I would get the extension tubes, T and an additional strainer for the 7400/2 and 7300/2 and consider a transformer upgrade to make the 7300/2 a 7400/2. The intake would be extended and T'd and hidden behind the rock work. This is how I do it for anemones and it is the safest way, 2 * 7400/2 should be plenty of flow for an anemone.