I have been looking at the set ups of frontosa tanks and most seem to have large plastic or teracotta tubes. My problem is I dont really like the look of these in a tank, being round you couldnt really hide them. However I do have lying around 4 or so juwel internal filter boxes and thought maybe I could use these as having flat surfaces I could probably hide them better in between the rocks. Question is would I need to but the base off so they can swim all the way through or leave them as a cave?