Vtec17
Aquarium Advice Newbie
Hi, can anyone advise - I have a 110 L set up with external filtration and LED lighting, within this are 5 x Platys, 1 x Red tail black shark, 1 x Black ghost knife fish and a small loach (unknown as thrust upon me!). Everything has been fine and all seem to be happy but the Shark has suddenly (from yesterday) been entering the Knifefish cave and chasing him out into the open which he is obviously not happy about, the shark is also harassing the loach as soon as there is any hint of food about. I am concerned for the welfare of the Knifefish predominately as it is a very peaceful fish? Why would the balance of the tank change when it has been very peaceful for ages? Any help would be appreciated.