Aquarium Stuck On The Nitrogen Cycle

Feb 16, 2012 - So having inadvertently killed a couple of goldfish because I didn't really understand the nitrogen cycle and I put them in pretty much right away (yes, I'm an idiot; yes, I feel like a monster), I have since cleaned out the tank and filled it up again and am attempting to start over from scratch with a fishless cycle. I have a 14-gallon kit (the Aqueon from Petco) with a filter, a heater, an air pump, and a handful of live Anubias and Amazon . After frantically Googling for most of the...

Feb 5, 2012 - I have recently set up an 80 litre long aquarium for my biology classroom at school. I am stuck on what fish/invertebrates to stock it with safely, however. My first ideas were shrimp and gouramis, but that was quickly dismissed. I would like a combination of bottom dwellers, schooling fish and larger, pretty fish to be a centre display. I am also wondering, would a crayfish be suitable in this tank? It is about 2 1/2 feet long, and a foot wide and about 15 inches deep. The tank is fitted...

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