Flood and Drain
Posted 30 June 2020 - 01:36 PM
On draining the kiddies pool, there will be about 2 or 3cm of water that the pump won't suck up. The fabric pots will be sitting in this 3cm of water at all times. That 3cm will be exposed to my hps light.
I know there are better solutions (drilling a hole etc) but with the current setup would it be a problem? I'm leaning towards no as the water gets refreshed every 3 to 4 hrs but wondering due to the light hitting the roots in the water (as they'll grow through the fabric pot base) am I asking for root rot?
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Posted 30 June 2020 - 06:15 PM
figure your using rockwool starter to start the plants off not just straight perlite ?
i've been running a new small flood and drain for seedlings and early veg for about 1 month or so, my flood "tables" would have less than 1cm, more like 5mm really, of water left over from the flood that light is hitting directly so i just run 2.5ml/L of 50% h2o2 with no algae problems but i dont change my res for a month so i fugure 0.7ml/L would last a week.
best bet try covering it all as suggested above and try the h2o2 if you get problems