Sediment may have been stirred up.
That would be a standard 29 gallon aquarium
You can put one maybe 2 one-inch fishes in your one gallon aquarium
Spare parts can be bought for most of the better brands of filter. Check with a few pet shops.
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Its all your choice, my friend. However, the bigger the aquarium, the better the ecosystem- so I'd go with the 40 gallon. I have a 40 gallon fishtank myself.
A one gallon aquarium is very difficult to maintain, however it can be done with proper filtration. An under gravel filter however does not work for saltwater very well at all. If you only use large substrate then it can work with constant water changes. I have a one gallon aquarium for a bright green mantis shrimp that I run with a small internal filter. I take a small cup of water out of it and replace it with my hundred gallon every once in a while. Tank has been up and running for almost a year now with no problem.
The recommended number of ghost shrimp per gallon of water for a healthy aquarium environment is one shrimp per gallon.
The rule of thumb for stocking levels in a freshwater aquarium is 1 inch of fish per gallon of aquarium. For instance, five 1" guppies in a 5 gallon tank, or ten 3 inch cichlids in a 30 gallon aquarium.
Roughly 8.5 lbs per gallon. You do the Math.
It is generally recommended to have 1-2 ceramic rings per gallon for optimal filtration in an aquarium.
A 55-gallon aquarium typically weighs around 625 pounds (283 kg) when filled with water. This weight can vary depending on the specific dimensions and materials of the aquarium. It is important to safely support the weight of the aquarium when setting it up.
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