Every now and again, a little rinsed, formerly frozen food is good for the female and tempers her interest in the kids. Frozen bloodworms or glassworms are among my favorite frozen foods. Certainly a lot of brine shrimp is used by aquarists and ironically the frozen b.s. is probably more nutritious that the live brine shrimp - which may have been without food for quite a while in shops. If they leave uneaten frozen food in the tank for more than an hour, siphon or turkey baster it out! That is important for the health of your guppies.

A few blackworms (in a floating feeder or in a soapless jar) are also excellent conditioners for female guppies. See the foods section of Immediate Help.

Ironically if you clean up all of the flopsam and jetsam you have alluded to in your tank, some plants would be useful and maybe necessary, unless you want to go that mop route. For more on plants, again see the Immediate Help section.