Hello Everyone! I need advice. How often should I do partial water changes, 100% water changes, and thorough cleaning of gravel/decorations? This is for several 3 gallon uncycled water tanks with filter, heater, gravel, 1 log, 2 silk plants, and one betta each. Right now I'm doing 50% water changes every four to five days and a complete breakdown/cleaning of the tanks once a month. Please advice if I'm not doing it right. Thanks!!!