Tips for Choosing The Best Goldfish Bowl
There are 3 main things to consider:
In general, the bigger the bowl – the better.
More water volume helps dilute the waste byproducts…
… and increases surface area for oxygen exchange.
Larger bowls allow more space to grow aquatic plants, which are INCREDIBLE for keeping the water safe for goldfish.
More plants = less work.
And they can support more fish.
From an aesthetic perspective:
Larger bowls have less distortion for viewing your fish than smaller bowls.
Related Post: Best Fish Bowl Starter Kits
2. Surface Area
This isn’t as much of an issue if you have some kind of electric filter or airstone creating gas exchange.
Bowls that have a larger surface area (i.e. wider opening) for the water can support aquatic life better – especially when plants are being used as the only filter.
Thanks to better oxygen exchange.
You can also achieve a larger surface area by not filling the bowl up all the way to the top (if using a typical bubble style bowl).
You lose water volume which results in less swimming space for the fish, so starting out with a larger bowl can make up for this.
Sometimes the more unusual styles of bowls can actually afford great surface area for the size (even glass trifle or mixing bowls).
If using glass aquaria, thicker glass will be more durable.
Trust me, you will want this.
Glass that is too thin can burst without warning, harming your fish and your house and leaving a huge mess.
The bigger the bowl, the more important it is that the glass is durable.
Plastic or Glass?
Plastic containers are definitely the cheapest.
I even have one myself…
… but honestly prefer glass given the choice.
Plastic can leach chemicals into the water if heated which can harm aquatic life.
(The stuff used to make plastics can include glass fibers, mineral, flame retardants, colorants, release, silicone, formaldehyde and more – yikes! (source))
So while glass can be more pricey, it gives you peace of mind for the long-term health of your fish, especially if you plan on adding a heater.
The investment is well worth it.
A goldfish bowl is not only supposed to be an ornamental accent to your living area…
It’s perhaps the most fascinating and educational object you can have in your home!