You should have it running for about 2-3 days before putting fish in your tank.
Fish can stay in the fridge for up to 2 days after thawing before it should be consumed.
If you grill the fish too long, it will dry out drastically and won't be as good. You should time it so that the inside of the fish is flaky and not watery, and the outside is lightly browned. The timing and the temperature go hand in hand, so you should determine the correct temperature before putting your fish on the grill.
As long as you have a filter for your fish, it should be fine, just make sure you wait however long the instructions say for the filter, before you put the fish in.
Fish should be left to defrost in the fridge for approximately 24 hours before cooking to ensure it thaws safely and evenly.
until it looks like the same size of the other one
It is recommended to wait at least 24-48 hours before transferring fish to a new tank to allow the water temperature and conditions to stabilize.
No, you're not allowed to fish at all.
How long do I have to take fish oil?" and after how long I can get the result ? Taking fish oil I will not gain weight
Usually you should wait for a month, that's the time it takes it to wear off.
With the gravel, and the filter, and your ornaments/plants ready in it, you need to leave it for 1-2 weeks. (depending how desperate you are) You should not buy your fish unless you have had it ready for 1-2 weeks!
You should feed your fish about a pinch of food once a day.
Cooked fish should not stay at room temperature for more than 2 hours. Less time is better. At that point, it should be reheated or refrigerated.