I know people have different ways of doing things, I know people that feed the whole grow. But I think I might do feed, water, feed, water, and so on. At least during veg. Or Feed Feed water Feed Feed.i would just leave them as is... as they are still "using" the parts of the leaves that arent burned up...
so what if it "looks" ugly... the plant will get rid of them sooner or later on its own...
yeah one gallon is about right... use a smaller bottle to fill up with so you can pour and spread and distribute the water evenly to make sure the water gets poured on the outer edge then work your way in... (best way imo)
you'd be suprised that it should be plenty of water... and water will still come out of the bottom as 1 gallon of water is sufficiently adequate to moisten the "so called" 5 gallons of soil...
"overwatering" is only when the soil stays wet constantly and isnt allowed to dry sufficiently before watering again...
1 gallon of water should last you around 4-5 days under those temp and humidity conditions before watering again...
fans and their use depending on how close, speed etc... will obviously as well... dry up the soil faster if constantly on too much...
im sure you know already... lights on... fan on.................... lights off... fan off...
water at least once or twice inbetween feedings so soil can be washed thoroughly before you do a feeding... otherwise the soil will build up fertilizer salts and or alter the pH to the point that lockout occurs and the plant then wont be able to absorb nutes cause the pH has dropped too much...