Watering after seedlings have sprouted?

soilless, so you provide all nutes at all times that the plant needs. 100% dependent on you. Always fertilize, always 20% runoff... allow wet-dry cycle. You are basically maintaining fertile substrate at all times. Not too much.. Not too little. The 20% runoff ensures pH remains consistnet, concentration/balance of nutes remains safe and fertile, encourages more root growth, and reduces risk of pests. Soilless is much like hydroponics... often categorized toegether. i'd suggest a 6.5pH, but if your brand of nutes says otherwise, do as they say on instructions... if you have a good blend worked out with good outcomes, stick to your 5.8pH. pH will impact what the actualy optimal blend should be... you'd need huge sample sizes of clones to determine which is more optimal... and the differences may be negligible in this context too. So, i won't push you to change what you do now... because the way you've learned to balance your feed is at that pH... it'll be a different balance of concentrations at 6.5.