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  1. mike91sr

    Idea for keeping reservoir temps cool

    Not sure why you went from a civilized debate to an ad hominem argument but Im done discussing this with you because of it. Youre just standing there with your eyes and ears closed screaming "IM RIGHT" over and over, repeating the same DO comment that is irrelevant since apparently winning what...
  2. mike91sr

    Idea for keeping reservoir temps cool

    Ok, I'm far from an expert on flooded tubes, but I didn't think they depended on DO for the plants to get oxygen. Any type of NFT I've personally seen has water flowing aggressively enough to be loaded with crests and bubbles, just like a fast flowing stream with rocks in it. With that said, the...
  3. mike91sr

    Do you flush? Do you kill the lights prior to harvest?

    This thought process is exactly what holds back this entire community. Not knocking your growing skills, they're most likely far above mine, but I trust peer-reviewed scientific studies with quantitative results that actually demonstrate and measure the precise changes within the variable...
  4. mike91sr

    Idea for keeping reservoir temps cool

    A wort chiller is a coil of ss or copper that chills a wort for brewing beer. Basically a tube that provides a high surface area to allow heat transfer. No pics of my setup, sorry. Heres a diagram. Instead of pumping the chilled water in/out like the diagram shows though, keep it contained and...
  5. mike91sr

    Idea for keeping reservoir temps cool

    Youre right about the low DO, but a plant isn't going to suffocate just because the water can't dissolve as much oxygen. Heres why.. No matter how much or how little oxygen is dissolved in water, its irrelevant if you provide enough oxygen to the roots themselves. In DWC, all you have to do is...
  6. mike91sr

    Idea for keeping reservoir temps cool

    Root zone temp IS res temp. Unless you keep your roots somewhere else lol. And if you can find me some peer-reviewed studies on cannabis, I'd be glad to check em out. But tomatoes are one of the closest species to it, and they are widely studied, so any findings for a tomato plant generally also...
  7. mike91sr

    Gastanker's 600+w Organic UV Grow

    Hey Gas! Been awhile, looks nice over there, feelin ya on the heat. Just starting to cool down around here. Awesome tank setups too. I've had this nagging urge to get a small fish tank going again. Buddy of mine is trying to talk me into saltwater reef. Gets kinda $$$ though.
  8. mike91sr

    Idea for keeping reservoir temps cool

    I think you meant 86 ;-). If your res is any cooler, you're getting less than optimal growth. With the benefit of not having bacteria outbreaks every other day of course, but still not optimal growth. http://www.plantphysiol.org/content/73/1/46.abstract
  9. mike91sr

    Idea for keeping reservoir temps cool

    Buy a used dehumidifier (got mine almost new for $50), $8 water pump, and a $40-50 ss wort chiller. Pull the evaporative cooling coils/radiator out of the dehu unit, place it into a plain water reservoir. Pump nutrient solution through the wort chiller in the cooled res and back. Put the dehu on...
  10. mike91sr

    Idea for keeping reservoir temps cool

    Yeah whoops forgot to specify I guess. I agree, a chiller is probably overkill for something smaller, ~400w or less. Depends how you look at it, oz of prevention is worth a lb of cure. I personally think the $100 for a DIY chiller is worth the saved risks that come with high temps, and cost of...
  11. mike91sr

    What size reservoir do I need?

    By external res, I mean something you can cool directly that's preferably outside the tent. If you have all your water inside the tent, its ALL getting warmed by the lights, and you'll end up having a setup outside the tent to use a chiller anyway(if its dwc). I dont recommend running nute...
  12. mike91sr

    What size reservoir do I need?

    I dont like the idea of using DWC if you cant get an external res to cool, or your room never gets up to 75*. The biggest problem with that method is high temps that lead to bacteria problems. So if you cant control that, I would personally suggest another method probably E&F or DTW. And I love...
  13. mike91sr

    Idea for keeping reservoir temps cool

    Man if you're willing to go through that much trouble and expense, why do it to pump slightly cooler air through the water? You're going to spend a ton of money on the electricity to run that fridge nonstop(air pumps produce heat as they run, meaning the fridge has to constantly counteract it...
  14. mike91sr

    Idea for keeping reservoir temps cool

    Thats where I got my wort actually. 50' though, more surface area means more heat transfer. Plus, I plan on dual-purposing it when I get my brew setup goin, and rate of cooling matters alot more with that than this hobby. And a'boot pathogens, I never thought of that before but I'd assume they...
  15. mike91sr

    Idea for keeping reservoir temps cool

    I've done that before but without any top, works pretty well. Just make sure the water level in the cooler is high enough to be effective. If you do put a cover on, styrofoam would be a better insulator than wood. It won't get warped and moldy if it gets wet, and its already white, so no need to...
  16. mike91sr

    Help me properly PH and Nute my water, My plants are not growing.

    No. Vinegar doesn't hold, baking soda will work but not as well as other things. For pH down, go with phosphoric acid or citric acid. Phosphoric will provide the plants with P. For UP, potassium carbonate is your best option IMO. Provides K to the plant. See the trend here? Baking...
  17. mike91sr

    H2 O2 Oxidizer...Can I use it for flushing?

    I reduce my feed levels during the last couple weeks, precise amounts and timing are based on individual plant needs. There is no NEED to flush if you weren't feeding to the point of massive salt build-ups, the belief is that it strips the flowers of the plant of their stored nutrients and...
  18. mike91sr

    RIU advice is so bad

    Isnt it ironic that the more one learns, the less inclined to share their knowledge they are. I'm the same in most cases. I try to stick to discussing facts and only disagreeing with others' opinions if they are factually incorrect. And I do my best to clarify what type of information I'm...
  19. mike91sr

    H2 O2 Oxidizer...Can I use it for flushing?

    They said that because its one of the most expensive flushing products out there, and all thats in it is magnesium and EDTA, which binds to things like mn, mg, ca. Flushing in hydro serves no purpose but to starve your plant when it needs those nutrients and energy to properly ripen. And if you...
  20. mike91sr

    Enter The Scrog/Scroggers United Post Page

    Depends on how/if you get them ready for the screen. I have a separate veg setup to save time so mine aren't put under a screen at first, I top and LST them so they're spread, then I move them into the flower tent and drop the screen on them, veg them in for about a week and put them into...
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