So I've been up and running for a week now - so far so good. I have a 75 gallon tank with a Fluval 305 and an Aquaclear 70. I've got 5 2-inch fish and 2-inch catfish. My questions:
- How often do I need to change water?
- How much should I change each time I do it? eg, 10%, 25%?
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