Hello. I currently have an ACF in a ten gallon tank. A few weeks ago my teacher got a gold fish from a student (who was carrying the poor thing in a plastic bag all over the school) The gold fish, named Gold Dawg, now lives in a tiny tank in our physics class that only has a filter and gravel, but appears to be doing much better. My teacher said he would probably give Gold Dawg to a student before summer vacation, which is just around the corner. I don't want this gold fish to end up in the same conditions as before, do you think he/she could live in the same tank as my ACF. Both are about the same size, (Gold Dawg might be a bit bigger than Stitches, the ACF). What do you think?