calcium deficiency need a quick cheap fix

i have 3 plants, 2 WW and 1 Satori each is about 10 days into flowering. the satori is showing a calcium deficiency and im low in funds. does anyone know of any cheap sources of calcium that i can purchase perhaps at the local grocery store?
thanks

get some eggs...boil the shells grind them into a fine powder an mix with water...the shell is mostly compriesed of calicum carbinnate...peace az

ok heres the how to dry egg shells in a pan in the oven at the lowest setting crumble or pulverise them in a food processer or blender or mash yourself into powder...mix over top of soil for a quick shot of cal while help even out soil ph....ground clam an oyster shells can be used for the same purpose...doubt it as a foiler spray....peace az

dolomit lime adds calcium and magnesium. its cheap and it regulates your ph at 7. mix 1/4 cup per five gallons of soil

moz324 said:

dolomit lime adds calcium and magnesium. its cheap and it regulates your ph at 7. mix 1/4 cup per five gallons of soil

Click to expand...

...that's my answer also. Rapid release dolomite lime, 1 tbls per gallon of soil as a top dressing.

Dolomite Lime? Didnt know that... I thought it was only used for PH adjustment...

cal-mag its like 20 dollars at grow store careful with those eggs thell raise the PH
you might also want to hit up your other macro nutes if cal was short mag cal sulfer