PizzaAndPopcorn
Aquarium Advice Newbie
Hi! We started a new 20 gallon tank 9 weeks ago using some water from a previous betta tank. After 2 weeks, the tank was cycled (0 ammonia, 0 nitrites, 5-10 nitrates). Next, we added 3 guppies, 2 gold panda mollies, and 5 cherry barbs. About 10 days later, the water turned cloudy and green, and several fish died. The water cleared up after a week, but after a month the water is cloudy and green again and another fish has died. We have removed all of the fish and put them in a separate tank, which has not displayed the same problems of the 20 gallon tank. Our questions are, why is the water cloudy, what could have caused the fish to die, and what do we do now?
Additional information: This 20 gallon tank has an Aqueon LED QuietFlow 10 filter (we removed the supplemental ammonia cartridge after a month). We use an API Master Test Kit and have not had ammonia or nitrites in the 20 gallon tank while fish have been in the tank. Our average weekly water change is 2 gallons (10%) and we vacuum most of the gravel with each WC. New water (tap) gets treated with water conditioner and bacteria supplement. We had the LED lights on 12 hours a day for a while, then we turned off the aquarium lights to decrease risk of an algae bloom, but another bloom happened anyway. We are using white gravel, which we rinsed many times until water was not cloudy anymore. pH is 7.8. Temperature is 76. Latest nitrates was 20 ppm.
Additional information: This 20 gallon tank has an Aqueon LED QuietFlow 10 filter (we removed the supplemental ammonia cartridge after a month). We use an API Master Test Kit and have not had ammonia or nitrites in the 20 gallon tank while fish have been in the tank. Our average weekly water change is 2 gallons (10%) and we vacuum most of the gravel with each WC. New water (tap) gets treated with water conditioner and bacteria supplement. We had the LED lights on 12 hours a day for a while, then we turned off the aquarium lights to decrease risk of an algae bloom, but another bloom happened anyway. We are using white gravel, which we rinsed many times until water was not cloudy anymore. pH is 7.8. Temperature is 76. Latest nitrates was 20 ppm.
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