Adding Borax to Make your Pool Resistant to Algae

[phillipjko]

If I am going to be away for about 3 weeks and cannot start the pump/ filter.. can I add Borax Mule to make the salt water pool 20k+) to be more impervious to algae? I see some greenish powder stains in pool. Pools i perfectly balanced but I get some algae now. could it be the terribly high temps now (94-96 degrees). Should I add a floater with Chlorine and possibly even over chlorinate the pool before I leave and add calcium to about 300+ (I heard calcium also helps with buffering chlorine and add 10 boxes or borax mule?