How does 1 properly PH?

[stinkyattic]

I tried to flush my last plants and it seemed like it wasnt draining the water out. I believe I put a bunch more holes in all the pots after last plants(used a knife).

If it isn't draining your soil might be too heavy/rich; perlite is a good fix for this.
That's another indication you might have a nute block rather than a straight deficiency- waterlogged, acidic soils are BAD!
Rather than a knife, I'd go for a paddle bit on a power drill to get nice open holes. The buckets I flower in got holes drilled right up the side so more O2 gets to the roots. They drain very well now too.

Now would you say to use a gallon of distilled water per plant?

I believe the rule of thumb is to use 3x the volume of your pot. So if you have a gallon pot, use 3 gallons of water.
Some sources say to use a very weak, balanced, pH'd nutrient solution to flush with, at no more than 1/4 the strength you would normally use.

Also, you are saying to add maybe just 1/4-1/2 tsp of epson salt to nuted water right after I balance out my nutes?

Yeah. That's the rate at which I apply the stuff, once every 2 weeks or so.
I would urge caution so you don't end up with an overdose. The literature on this subject notes that MAgnesium deficiency appears much more severe in very wet and/or acidic soils. So it may turn out once you get your soil pH worked out that you never really had a deficiency to begin with; it was just blocked.

Now, do you give nutes every watering or what?

Personally I do. They get their regular fertilizer at the recommended strength at every watering. They also get supplements. They get a carbohyrate supplement, Silica Blast, and Super Thrive every watering (flowering plants skip the S.T.). Then, depending on how they look, I give them a little fish goo, or kelp goo, or bone meal, etc. every few waterings.
My schedule is pretty flexible, since I'm still growing several strains from seed I haven't tweaked it for one specific variety yet. Once I choose a few good mommies it will be a different story!

Stinkyattic, were trying to say that it might be in nute block or something? I read about that yesterday and to fix that 1 would flush his soil, feed his plants with ph balanced nutes?

Exactly. Someone correct me if I'm wrong here, but it seems that for most micronutrient problems, it is the pH, rather than the absence of that nutrient, which is the culprit.

I normally add half of the stength of recommended dose that the nutes tell me and just starting adding a little superthrive once a week .

I didn't catch what you're using for fertilizer. Superthrive is good, just a drop per gallon, in veg.

If you're using a fert meant for MJ, you should be just fine using it at the dose it says on the bottle for 'regular watering'.

So get your drainage sorted out as a first step, and it will be easier to pin down what is plaguing your babies!