First Feeding...Now what? + rep

Hey guys, I fed my 4 two week old plants for the first time. I gave them a small amount: 30 mls of GH flora micro and 60 mls of GH flora bloom. This was yesterday. I know they probably aren't drinking alot as they are small. I'm just wondering about topping off or changing resivoir...Any help would be great.

This is in a 13 gallon resivoir.

I just fed my 13 day old plants nutes for the first time as well i added 13 drops of miracle gro to 1gallon of water to achieve 1/4 strenght thats what i have read is the proper amount for young plants.

Daily you are going to top off your res with plain water if needed and check ph & ppm.
Weekly you should drain res and refill with fresh nutes and adjust your nutrient amount to reflect the stage of growth.
Several nutrient companies have feeding schedules for their products on their websites. If the nutes you are using are a mix of different brands you can still use the schedule as a base for what should be used and when. Always use less than recommended especially with hydroponics. It is easier to add more nutes when needed than to have to drain your res and start over. Get yourself a ppm meter so you can see exactly how much nutes are in your water. Good luck.