Originally Posted by Ink
I have that same submarine but none of mine even took a second glance, lucky you!
my other CT has a broken down tank (track vehicle) cave. ive never confirmed that he's used it but he loves the tiny 3x1.5 inch domed cave ive provided. ive yet to confirm my dt uses his tiny cave.
my VT never really had a cave before but a filter baffle was removed and i stopped with plants in the divided 5g. the current was a bit much and he took immediate shelter in a newly purchased cavearound 6 inchs in diameter. the baffle issues was resolved to calm the water down but he still uses the cave.