potassium sorbate
i have found that every one recamends 1/2 tsp per gal but i use 1 tsp per gal because if i dont the wine always refermints so i think this is your problem then de gass the wine with a drill mounted whip and put wine in bucket with more cherries to get the flavor back then...
or get a hose that wil seal on the carboid and put it in to a bucket of water the bad thing about a baloon you are taking a good chance in wild yeast contamination
yes it will you need to get bentonite 2 tsp in 1/2 c of boiling water let desolve and poor it in to your wine let sit 24 hr and rack and repeat tell clear
well im just learning about wine i have been making beer for aseveral years and for a blue berry and palmagranit wine you will have to use real fruit or bag the prosses you can try a mixed juice if you like but i cant promis the results....... i would do a blue berry and i would use 10 welches...