Yellowing tips and white blotches.

I have been researching for a while now. I have finally decided to start my first grow and I just used seeds I had saved over the course of 6 years. Good seeds only! With bags that had either really good taste and smell with hardly no seeds in the bag to the sad,brown,compressed donkey poo (My not so smart friend threw in) that has forced me to grow my own. So.. my question, is this just heat stress, pH issues and cal/mag deficiency or a virus infection?

Specifications:
Age: 20 day old seedlings.

Temp: 84 to 95 yes I know I have been struggling with heat just made a small A/C unit now 80 to 84.

Ph: Unknown, due to shipping problems I won't have a tester for another 5 days.

Lights: 300w LED 16/8 light cycle.
Watering: every 2 to 3 days with rain water only and a foliage spray of spring only.

Nutrients: Nothing but a tablespoon of epson salt I added to my 5 gallon rain water storage 2 waterings ago.

Pictures :

Substrate: Soil I mixed my self with home made with worm compost, blood meal,bone meal,peat moss,choir, vermiculite and perlite.

this leaf looks like its being eaten, have you checked the underside of the leaf for bugs with a magnifying glass, i would give them tap water for the calcium

I was thinking of adding a cap of milk to 26 oz of distilled water for calcium,zinc,magnesium,copper,potassium and phosphor. And I'll give a look but I don't have a magnifying glass.

I have not mites that I can see but a bad gnat problem I just didnt think they could be that harmful.

just noticed you mixed your soil, did you put the nutes in the right quantities ,including buffers, what is the ph of the soil

See I think that's my problem because of shipment errors I can not receive my pen for another 5 days.

First and foremost it's over fed with n for sure.

yup soil ph, and alot of N in blood meal,

I was thinking of flushing it out with distilled water and keeping it at that.. I know heat has alot to do with my problem as I have had temperatures raise to 95 with rh at 40% some days could that be causing the bloches?

Looks like too much N. Maybe gnats if indoor?

If you have gnats in soil use a little H202 in the flush it should kill any larvae in the rootball