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my understanding was that PPM is derived from EC using a multiplier which differs from vendor to vendor and is inaccurate to begin with. if that's the case, then why am i calibrating my Hanna with growtek 1000ppm reference solution? shouldn't they give you and EC value instead? anyone know what...

increased light to 2x 400watt HPS. going to hold steady there for a while. lots of new growth filling in. the solid state variable speed fan controllers made it possible to dial in the light cooling fan and room exhaust fan to exactly where i needed it maintain temp/RH. big improvement over the...

they live in one of the 32gal garbage cans. plenty of room for them. they seem pretty content. most of the fish have been going for over a year, and previously in even more cramped conditions with crazy turbulence caused by bell siphon draining on top of them every 10 minutes 24x7. don't tell...

yes, "grow light home depot," as they say. sounds like a bot to me.

left out GH micro fro the list of nutes. also, three daily feedings of goldfish food seems to bump up EC by 0.01 every two days or so (~5ppm/day). planning to reduce fish feed to once every other day during flushing to minimize ammonia/nitrate/nitrite production. was also considering letting the...

unless there's salt in the water in the bottle, in which case you can actually get the temperature lower than 32F/0C and get additional cooling.

what problems do you foresee a shallow well pump causing? if you're just constantly wetting your roots with low-pressure nozzles and your pump is on 100% of the time, then i can see how you think this will cause problems. you can dial down the pump to whatever pressure range you want, even a...

3/4hp or larger shallow well pump with pressure tank. that'll give you "medium pressure" aero at around 60-75psi. no problem running multiple totes off of something beefy like that.

i'm inclined to go with the CO2/carbonic acid theory. i think chlorine might be gassing off too. tap water is pressurized, so it can hold a lot more dissolved gasses, i'm assuming. bubble the shit out your tap water before you use it. i keep a garbage can filled with tap water. i don't pH it or...

what kind of pump(s) are you using? did you determine the reason for pump failure? didn't start back up after power outage? that happens to my fountain pumps when they get fouled up. they need a nudge to get going. or did it mechanically just die? when i was playing around with aero, i used a...

currently, pH 5.6, EC 0.82, 596ppm

last season was a disaster. whiteflies took over the coco grow. inadequate filtering and nutrient precipitation fouled the roots on the aquaponic side and i my plants prematurely died a few weeks early. i had to keep most of the harvest for myself, but i gotta say, considering all the shit...

sure you do. i've got plenty of letters after my name too, just don't see the point it using it as a point of argument. good luck with that degree in inorganic chemistry ;)

to the contrary, excess estrogen causes lots of problems in girls going through puberty was well as mature adult females. excess estrogen can cause menstrual cramps, ovarian cysts, acne, PMS, migraines, cancer, and all kinds of other problems. that's why progesterone can be dispensed without a...

1. hepatitis a, b, c, d and even HIV die on contact with air. also, i'd image that one would be collecting it from oneself who would presumably be free of such pathogens. bovine blood could contain plenty of pathogens that could infect humans as well, especially since anything that comes out of...

simplified things with aquaponic cloner. bullet proof.

getting them to multiply in a bucket before application is cheaper than just adding a ton of the shit to water and dumping it onto my soil/coco plants. it's also not a free ride for the plant. symbiosis means they both get something out of it. the myco gets food, protection, etc. in exchange for...

there are 2 kinds of mycos: ones that live only outside roots and ones that live symbiotically with/on/in roots. so, sure, certain kinds of myco can only COLONIZE or live with roots, but that doesn't mean they can't feed. how do you think roots feed them? with a spoon? a straw? roots just stick...

period? why not? you're not dipping your buds into it. besides, they've been doing it for years with bovine blood: https://secure.wikimedia.org/wikipedia/en/wiki/Blood_meal humans routinely eat blood that's in meat products. think of a nice juicy steak. i like mine medium rare. i like the taste...

what's the point of putting molasses in feed? refined sugar, molasses, barley, oats, rice, fucking white bread is all the same thing to microbes: carbohydrates. what's the big deal? what's all the "oh my god! barley?! wtf?! that's stupid." whatever. i drink the shit. instead of throwing it into...