You can buy sea water from a fish store, or mix your own synthetic seawater. This means that putting your hands into a tank with running equipment can cause electrocution. It is OK to only run the powerheads for 12 hours daily. Place high capacity biological media above the air-stones to fill the container. You can use an aquarium siphon to help remove the dirt and debris from the gravel and a net to gather up the floating debris. There are a lot of parasites, bacteria, and other microscopic creatures in aquarium water because it is living water, and also because the aquarium is a much more concentrated environment, than the large open ocean. It is quieter and may be more effective than spray or drip systems. Just as Plants play a role in Nature by consuming fish waste, in an effort to recreate Nature, we recommend live plants where ever possible because we are trying to recreate a working ecosystem and plants are a part of that. We expect there to be a huge resurgence in under gravel plates especially after we redesign them to work more efficiently with our device while incorporating some cool features that will solve other long standing tank problems while making the tank environment more healthful. the answer to that is "its relative". We will be designing a new UG filter that will go with Nomo (No More Water Change" It will have several new features over the standard UG filters currently available... one feature is for Cichlid owners... preventing them from uncovering the UG filter. How long after water change can I test water. Unplugged the filter to do water change, Now it doesnt work. Run the skimmer for only about three hours after adding the carbon dosing mixture. Impeller magnets can loose magnetism over time from heat and usage, and may need to be replaced. They blow downward over the LED light fixtures, and over the aquarium surface water. Anything less will not work. "It is possible to create a no water change aquarium but not recommended". Fish don't "drown" out of water. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f3\/Keep-Saltwater-Fish-Without-Doing-Water-Changes-Step-1.jpg\/v4-460px-Keep-Saltwater-Fish-Without-Doing-Water-Changes-Step-1.jpg","bigUrl":"\/images\/thumb\/f\/f3\/Keep-Saltwater-Fish-Without-Doing-Water-Changes-Step-1.jpg\/aid7235726-v4-728px-Keep-Saltwater-Fish-Without-Doing-Water-Changes-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"