Is there a eel that is intimadating like the Japanese Dragon eel, put does not have quite the pricetag? I know of the chestnut and viper, but is there anything else? Not something that will hide all day. I have a marineland emperor 400, cascade 700 canister filter, and a red sea prizm protein skimmer, will this work in terms of filtration?(can buy different stuff) Also have a spare 55 gallon, although can get bigger tank.