| I could not tell you if this is good or bad. I just had this problem in my tank. I had not done a water change since Sept, yes I know I should do it more often, but I had shoulder surgery and was unable to do it. I started to see that something you describe and did water changes, one last weekend and one this weekend, and then rechecked the water to make sure everything is ok. I have not seen bubbles on everything. As for the crab, he would go to the sump. |