Here is another inexpensive option to kill the aphids if the tomato leaf mix doesn’t kill them on contact or shortly there after.
Key ingredient is potassium of salt fatty acids in the soap you use.
If you have Bronners (body care) liquid soap it has the correct ingredients (potassium of salt fatty acids) that is what does the damage to them.
Castile soap or any soap with potassium of salt fatty acids will work.
2% spray 9.5ml per quart
3% spray 14.5ml/qt
4% spray 19ml/qt
You can add other ingredients to the mix but this by itself kills a lot of little insects like aphids and spider mites etc…is also supposed to control and kill WPM but I haven’t had that issue to find out. It melts the mites on contact or shortly there after. Never used it on aphids but from what I’ve read it is supposed to.
Get rid of the aphids removes the reason the ants are there and they will leave. The aphids are doing the damage so they are the deal the ants are the sign too look for telling you the aphids are there.
Link to more info for your reading pleasure