I was thinking those magnetic magnets that are buttons...but they're probably not waterproof. You almost need a button and a loop

Just wear a high waisted bottom and let the top float up.

When I'm in the water, I tuck the top into my bottoms. I untuck before I get out. I also wear super high waisted bottoms for more coverage.

People saying "wear a one piece" don't get it. Tankinis are better for so many reasons (bathroom, sizing) for a lot of people. If a one piece works for you, great! Move along, this post isn't for you.

You need one that's tight on the stomach, but maybe you prefer a floaty one?

Anonymous wrote:Sorry folks, but you're missing the point. I already have a top. It's blousy, which is what I want. But it floats up and gets in the way. Buying a new one is out of the question. I want to FIX this one.

Bedazzle the bottom hem.

Float up??? You're buying the wrong style or too big.

Fabric weights.

Anonymous wrote:Bra hooks? One side on the inside of the top, one side on the outside of the bottom.

Went this route, added two simple elastic loops on my bathing suit bottom that attach to a button inside my tankini top on the hips, discreet method to keep my tankini from floating up.

Look for 1piece faux tankinis. I love the stomach coverage and when it foats up I am fully coveted

Anonymous wrote:Sorry folks, but you're missing the point. I already have a top. It's blousy, which is what I want. But it floats up and gets in the way. Buying a new one is out of the question. I want to FIX this one.

Are you the OP, do you still have this problem four years later?

Sorry folks, but you're missing the point. I already have a top. It's blousy, which is what I want. But it floats up and gets in the way. Buying a new one is out of the question. I want to FIX this one.

Small weights such as magnets glued to bottom of tanking might work.

I had this problem and sewed some mini fish weights to the inside bottom hem to help it stay down

Just wear a normal bikini. Tankinis are so depressing.