Did i mess up? Flush right away?!!!

Hi all. Im in week 4 of flower. Genetics consist of 2-M2, 1-edens apple, 1- sundae punch, and 1- crazy cow, all from elev8 seeds in 3 gallon pots. Im in a 3x3 tent with a fc4800 led, ac infinity exhaust, passive intake, 3 fans and a exhale co2 bag. My temps are around 70 in dark and 80 when light is at 75% power. Humidity stays around 55.
My plants are in coco/perlite. I feed them about 900 ppm every other day phed to 5.9, 6.0.
I checked my runnoff today. Ph varies from 5.3, to 5.8. But my ppm is around 3500, even 4800 in a couple of them. Do i need to flush? I do not see any burn, or deficiencies, but i cannot imagine 4800 plus ppm runnoff is good.
Im really worried as tjis is a critical time in flower production. Thanks.
Added: I use Mother Earth Coco and perlite mix.

What substrate are you using? If you're using soil that reading is worthless.

MisterKister said:

What substrate are you using? If you're using soil that reading is worthless.

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Mother earth coco and perlite mix.

Have you been watering until 10-15% runoff?

You should be feeding daily to runoff, at least once per day, but twice per day would be better once your plants get used to the increase. I would feed those at 6.2 ph and 1.2 ec. Don't flush with fresh water ever. All you need to do is to start feeding a slightly lower EC to 20% runoff-the runoff will fix your situation.

MisterKister said:

Have you been watering until 10-15% runoff?

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I do every other watering.

Rurumo said:

You should be feeding daily to runoff, at least once per day, but twice per day would be better once your plants get used to the increase. I would feed those at 6.2 ph and 1.2 ec. Don't flush with fresh water ever. All you need to do is to start feeding a slightly lower EC to 20% runoff-the runoff will fix your situation.

Click to expand...

I have been watering every other day, approx .6 gallons per 3 gallon pot with no issues. I kinda knew I would have to water daily probably week 5-7, but I cant imagine watering 2 times a day...I would be going through nutes like crazy.

Rurumo said:

You should be feeding daily to runoff, at least once per day, but twice per day would be better once your plants get used to the increase. I would feed those at 6.2 ph and 1.2 ec. Don't flush with fresh water ever. All you need to do is to start feeding a slightly lower EC to 20% runoff-the runoff will fix your situation.

Click to expand...

I will start tomorrow. Thank you.