This is my first time breeding betta fish. It's been two weeks now and I found that many of my fry don't survive. I do water changes everyday with airline tube with sponge so they don't get sucked up. The water parameter is normal but why does my fry didn't survived ? It's because of the debris in the bottom of the tank ? I found it's hard to clear that debris because they didn't get passed the sponge. I put a water lily and a pristia to help with the parameter.