Absolutley NO water changes : Aquariums - Reddit

Water changes do not have to be done...You can have a very healthy aquarium without water changes.
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It is this sort of analysis, unfortunately, that has driven some aquarists to conclude that smaller water changes are not very useful. Yes, a fixed number of small water changes is not as useful as the same fixed number of larger water changes. The following sections detail how smaller changes with the same total volume of new water are nearly as effective as larger ones.
Regular partial water changes are the best way I know to keeping a saltwater aquarium and its inhabitants in the best of health.
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My view is that water changes are solely dependent upon the fish; the more fish or larger the fish, the more critical are regular water changes. The ratio of fish to water volume is the key. Fish continually produce liquid and solid waste and the liquid cannot be removed by any filter, only with a water change. Plants can handle the liquid waste but not in the quantity produced by the number of fish in most aquarist's tanks. Something like 7 or 8 neon tetras in a well-planted 55 gallon aquarium is the limit; beyond this, a partial water change is essential for the health of the fish. I do not think NOT doing water changes is some sign you are good aquarist, good at dosing rather, the opposite.
Photo provided by FlickrThere is a lot of export out of a non CO2 no water change aquarium also, it's called plant trimming and cuttings, biomass.
Photo provided by Flickrsubstantial water changes where water is removed and replaced from the aquarium. Topping off alone is not
Photo provided by Flickr
I don’t know about never changing my aquarium water but after checking out the eco-magic I think it’s definitely something I would like to have for my severely over stocked tank.Call me rigidly old fashioned, but I will continue to make substantial water changes. I don't own a lightly stocked discus set up nor do I believe a completely self sufficient aquarium is possible. They are closed systems with more wastes accumulating than are being removed.I was under the impression that you changed water to remove desolved solids and stuff that needs to be removed/replaced. Not like poo or anything… But like the meds and chemicals you use in aquariums….
So like, you still would have to waterchange, perhaps a little less often… But yeah… It might be a great filtration device…For nutrient removal, you can use phosphate removers, activated carbon, nitrate reducers (chemical or equipment-based, such as algae scrubbers) to lower the levels but not remove them entirely. To handle depletion of minor (trace) elements, it’s not financially practical to test every element in aquarium tank water and restore those via custom mineral mixes. Some trace elements may have actually risen in concentration due to other chemical reactions, and the only way to reduce their levels is with water changes.Figure 3 - 10, 20, 30, and 50% water changes and their dilutory effects. Note the effectiveness of larger % changes. The half-life of a hypothetical compound in the aquarium (t1/2 or time in changes to remove half) occurs at 8, 3, 2, 1 changes respectively.He overheard a conversation I was having with a beginner about water changes. He came over and said “I haven’t done a water change in over a year and my tank is looking great- even my clownfish are spawning”. I congratulated him on being a successful aquarist, and shrugged off the fact that he was challenging the advice I was giving to the beginner. But I was interested to know if his aquarium was really doing that well.