Hi, thanks for your reply. I will try to answer your questions...
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Originally Posted by Help_Needed
Hi Liflow,
First, you didn't mention what type of lighting you have.
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400w air-cooled HPS.
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Also, if you're topping off with just pure R/O water, then you WILL need to change out your reservoir after you've added enough water to equal the original volume of your nute solution (5 gallons in your case).
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I only added 2 gallons... the latest Lucas post I read said to top-off with RO water throughout the week and then add nutes once a week to get the PPMs back to where they started... Since my PPMs are going crazy I have no idea how much nutes to add so I've just been dump and restarting every week...
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Second, are you foliar feeding the plants? Small yellow spots doesn't actually sound like cal/mag deficiency. Cal/mag usually produces rust color spots, if it's the spotting your getting. Can you post some pics? That would help a lot.
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No foliar feeding. Trying to keep this simple. They start out as small yellow spots and if I do nothing about it, they get bigger, turn brown and start killing the leaves. It looks exactly like the first pic of a calcium deficiency in this post after 4-5 days:
http://www.icmag.com/ic/showthread.php?t=11688
But it starts out just looking like slightly yellowish polkadots.
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Third, the water clouding up sounds like your nutrient solution is destabilizing for some reason. Your suspicion about a bacteria *may* not be incorrect, but there could be other causes. The rising PPM suggests that something else is getting into your reservoir. Are your roots healthy? Are you having to adjust the pH at all, or is it staying stable? What growing medium are you using? Where did you get the buck, airstones, pumps, etc that you're using? Anything else that might be unusual about your set up?
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PH seems fairly stable. It starts at 5.5-5.6 with the fresh batch and drifts up to 5.8-5.9 after a week of topping off...
It's all kinda normal stuff as far as I know... 5 gallon white bucket covered in foil tape (both from hardware store), 6" ceramic air stones (2) from pet store and an EcoPlus dual-output air pump... Seems to make a TON of bubbles...
The roots looked healthy and white a week ago but I now have a scrog holding the plant and I'm not sure I can look in the bucket without damaging the plant...
Thanks again for your help...