Hi TonksKingsley. Keep your filter running and give it a chance to do its job. Remember a decent filter is not just about removing solids it's also about developing a healthy microbial population which will help break down some of your animals' waste and they need a constant flow of water to provide them with oxygen. Turn it off, and you'll create anaerobic conditions and open a whole new bag of problems. Very fine, particulate material held in suspension will eventually settle if there is no water agitation. With a filter running, this isn't the case and so I'd advise increasing the density of your filter medium or the size/length of the filter column. Mostly, this cloudy suspension is just not aesthetic, It looks horrid but does not impede gaseous exchange by the gills. I'd be happy to put an animal in this water, despite the cloud, providing the water has been allowed to age but I'd keep an eye on the health of the gills and let that be your judge. It's actually the things you can't see dissolved in the water, which causes the biggest issues to your animals.