The hardness of your water would depend on the species of fish you intend to keep. African Cichlids need hard water with a very high GH/KH (total hardness) but fish from the Amazon need soft water with very low GH/KH (total hardness). I would advise you to always independently research what water parameters are required for whatever species you wish to keep.
10 minutes
Yes, most freshwater fish need a air stone in their tank. And even if they don't need one it will improve the fishes health.
-( 0 0 )- -| |- -(____)- <<<<< this is an example of your crab!
I filled the tank with freshwater.
Yes but you need to buy a saltwater filter to replace the freshwater one.
no because if its a freshwater tank the rain has salt in it
yes.
waterchange
Do you have the space for them? because freshwater angelfish are generally good parents. however, you should separate the fry by gender when they grow older.
Because he is from freshwater and needs to breathe freshwater instead if air.
probably not.
To maintain the health and cleanliness of your freshwater tank, it is recommended to perform a water change of about 25-30 every 2-4 weeks. This helps remove waste and replenish essential nutrients for your aquarium's inhabitants.