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ok, so how many ppm does the water need to be?

where do you get the TDS meter? sorry what does RO mean?

yes, it's from the tap, but i let it sit out for days before i use it & i check the pH. i don't know what the ppm is, not sure if the water is hard or soft. i'm not using a water softener.

yes, you guessed right

it's been in the Fox Farm Ocean Forst for 5 weeks now & we started it in the Happy Frog potting soil from seed

i don't understand what you mean?

the pH is @ 7 & i've only added the epsom salt. it's only been watered with plain water with a pH of 7 each time.

would it be too much stress on the plants to re-pot at this time? they are in 5th week of veg & are only in 1 gallon pots. the plants were great until about 2 days ago when i saw the spots. or if i leave it how it is, will they be ok? should i add some N? sorry, i'm so new at this.

what does MMJileage and ppm mean? i use water out of the tap, but i fill up a gallon milk jug & let it sit out. i've checked the pH, it's at 7. here are some pics:

Ok thanx a lot! I'm gonna post a pic. Also, with my next grow, should I water only with plain water during veg stage or should I be using some sort of nutrients in my water during the veg stage?

Ok, I started from seeds in happy frog then transplanted to fox farm. They were doing great then I sa 2 of my 4 plants have the spots. I watered once with the epsom solution. So should those leaves be left on the plants or removed?

Thanx, I read that guide earlier.

1 tsp epsom salt per gallon, it's in fox farm soil.

Ok, so should those leaves stay on the plant or be removed? Also, how long should I water with the epsom salt?

I'm pretty sure I have a magnesium deficiency. I've only been watering with water, no nutrients at all. It's in 5th week veg. I added 1 tsp epsom salt to the water. My question is, how long should I water with the epsom salt & also should those leaves that are spotted be removed or will they get...