i was looking in my tank today and noticed something crawling around digging in my substrate, looked like a crab. it was around a dime size, maybe a bit smaller and seemed to just be pushing stuff around. is this bad? what should i do
i have recently purchased a 20 gal tank and decided to go with saltwater. ive put crushed coral as the subsrtate and have put liverock and raw basa to cycle the tank. do i need to purchase special lights to have anemone in the tank? i would like to purchase clownfish after the cycle is complete