I am new to fish keeping and bought a Betta fish about 10 days ago. I asked a Petco staff member to help me get the things I needed... he recommended a 2.5 g tank that had a built in filter. So went home set it up put water in it without the fish! Went back next day to check the parametersat store and they said the tank was ready for the Betta fish! Put him in the tank and saw that the filters current was wayyyyy to strong so I took it out... these last 9 dats I’ve been doing water changes and every time cleaning out the ornaments as I felt slime on them. Now I research and see that the only way to start the nitrogen cycle is to have a filter do I put it back in the tank... I am stressing out because i know my Betta hates the filter but I need that cycle to start or he is going to die which i really don’t want.