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Originally Posted by lauraleellbp
He's also doing 60% PWC 2x/wk, the stock are COMPATIBLE with each other both in terms of behavior and husbandry needs, and you can be sure all those plants are extremely healthy- BIG difference from your average hobbyist!
You could easily keep 100 cardinals in a 20gal tank given the water parameters are kept up; cardinals are one FW fish that are actually MORE happy in crowded conditions; wild schools often number in the thousands or more. Cories also are happier in bigger schools.
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So that's actually more like a 140+ gallon tank in terms of water quality. Definetly beyond average.