How long is a 150 gallon fish tank?

Answer 1

The basic rules for keeping fish successfully are :- 1 inch of fish needs a minimum of 1 gallon of water. :- Every tank needs a permanently running cycled filter. :- Every tank need at least 50% of its water changed every week. Follow and keep to the above rules and your fish stand a chance of survival. Fail to keep them and I can guarantee that your fish will be constantly getting ill and maybe dying.

Answer 2

If it is heavily planted and you are a good aquarist and can feed a lot and keep up with water changes then you can have hundreds of smaller fish in that tank. If they are larger or grow to be larger fish (4" - 9") moving space becomes an issue and about 5 - 10 give or take would be a good amount. If it is minimally planted or you are not into good husbandry then lined up tail to nose all your fish should not exceed 80% length of your aquarium or a bit more.