I purchased a Dracula and pistol combo on Tuesday. Since introduced my fire fish has been super reclusive when he used to come out for feeding. The pistol ended up digging to the back where my fire fish resided. Today I went to feed them and my fire fish was sitting on the sand in the corner and he’s not eating. I thought it was ich at first because only my blues were on but I turned the whites on and half his back fin is gone and some flesh is gone too. I can only think to blame the Dracula or pistol. Should I let nature take its course or what should I do? I have a spare 5 gal, heater, marine land 150 & 250 filter and I have matrix in my sump I can pull to cycle the tank. I didn’t think gobies got aggressive like that. Here’s a couple pics so y’all can help confirm and visualize it.