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How many fish can I put in a 3-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 3-gallon aquarium? What about a 20-gallon tank? 55 gallons?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
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How many fish can I put in a 40-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 40-gallon aquarium? What about a 20-gallon tank? 55 gallons?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
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How many fish can I put in a 30-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 30-gallon aquarium? What about a 20-gallon tank? 55 gallons?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
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How many fish can I put in a 55-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 55-gallon aquarium? What about a 20-gallon tank? 10 gallons?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
Read more...
How many fish can I put in a 5-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 5-gallon aquarium? What about a 20-gallon tank? 55 gallons?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
Read more...
How many fish can I put in a 20-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 20-gallon aquarium?” As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium. 
Read more...
How many fish can I put in a 10-gallon tank?
One of the most common but hardest questions we get is “How many fish can you put in a 10-gallon tank?” As you may guess, there is an infinite number of possible fish combinations for each aquarium size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact your fish stocking levels, as well as our general guidelines for introducing the right number of fish to your aquarium.
Read more...
What fish can live in a 10 gallon tank? - Aquarium Co-Op
What fish can live in a 10 gallon tank?
We often get asked "What can I put in a 10 gallon tank?," which is about as easy to answer as "What food can I get for under $10?" Fish...
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How do I get rid of blue-green algae or cyanobacteria?
Blue green algae (BGA) is a turquoise slime that can cover your aquarium gravel, decorations, and plants. It's actually a cyanobacteria and therefore does not always respond to traditional algae-fighting techniques. It is very susceptible to antibiotics that contain erythromycin, like Fritz Slime Out. To begin treatment, scrub off as much of the blue-green algae as possible and remove it with a siphon. After vacuuming the substrate and refilling the tank, add one full dose of Slime Out (which is 1 packet per 25 gallons of water), and let the aquarium sit for...
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How do I cancel my order?
Our packing and shipping crew works extremely fast, so once you submit an order, you only have a very short window during warehouse hours to attempt to cancel the purchase. Try contacting our customer service team using our contact form or by emailing shipping@aquariumcoop.mom. However, once the order has been packaged, there is no way for us to cancel the order at that point. The good news is that orders submitted after 4 p.m. PST usually won't be packed until the following day, so you have a better chance of canceling your order in that...
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How do I add products to my order or combine my orders?
Our packing and shipping crew works extremely fast, so once you submit an order, you only have a very short window during warehouse hours to attempt to add a last-minute product. Try contacting our customer service team using our contact form or by emailing shipping@aquariumcoop.mom. However, once the order has been packaged, there is no way for us to edit the order at that point and you'll have to submit a new order instead. The good news is that orders submitted after 4 p.m. PST usually won't be packed until the following...
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Which aquarium air pump should I get?
You can see our full lineup of air pump equipment and accessories, but after testing dozens and dozens of air pumps over the years, we have settled on two units that have superior reliability, low noise level, and reasonable cost. Each pump is best suited for different types of applications, so choose the right one that fits your needs: Recommended Air Pump for Small to Large Tanks Aquarium Co-Op air pump Our favorite air pump is the Aquarium Co-Op air pump because of the included battery backup that can be used in power outages...
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