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- Just started
I just started a fishless cycle in my new tropical 20 gallon yesterday and dosed it to 3 ppm for ammonia. I just realized this morning that I have access to what I assume is a cycled goldfish tank at work! Of course I would test the water before adding, but could I add a cup of water from this established tank to speed up the cycling process? Also, could I add some of this gravel to a 1.5 gallon Betta tank with 2ppm ammonia, .25 nitrite, and 0 nitrate? I started his tank before I knew about cycling but he'll be much happier in the 20 gallon when it's ready!! Any idea on how much gravel to borrow?