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You can get combined pH and EC (nut) meters, but it's cheaper to just get one if you can do without the other. It also means if you break one, you only need to throw one. If you don't have much $ spare, here's a post a made in another thread just recently;

The meters are kind of pricey, but once you've got one it should last forever - provided you only use it in your tank and give it a rinse under the tap after use.

Hmmmmmmmmmmmmm So I guess from what you've said that the table is basically right over the tank. Is the table a solid surface shielding the tank from the light? If it's a series of channels running over it and light is hitting the tank, it'll almost certainly be evaporating a lot of water...

I know you're asking nasd90, but thought I'd offer my experience with pH. My tap water is about 6.8. 7 is neutral and most tap water should be around the same. Adding nutrient drops the pH a few .1's to about 6.4. Making the nutrient slightly acidic (5.5 to 6) allows it to become more...

I'd really appreciate some help with this guys. It's not designed to be a which is better thread, I'm just wondering which you've used in the past and would be interested to know. Some of the brands are the same thing, e.g. sunmaster is a trademark of venture, so I've put them next to each...

If you do decide to mess with pH or EC, I'd recommend going for pH first. Burn is quite easy to avoid with a measuring jug. As soon as the jagged tips of the leaves show that yellowing / fading, dilute the solution 10% or 20%. Never push it with the concentrate and measuring it out, what it...

If water is evaporating from the system, the concentration of the conductive ions will rise and the EC pen will say so. It could be that you're loosing H2O to the air around the plants quicker than they're eating up the nutrient. The lid to your tank doesn't need to be 100% airtight, just...

Having done quite a lot of chemistry and having a pH meter that reads to .001 with a temperature probe.... I would suggest that quite a lot of the bouncing is not only the good suggestion of plant waste but also the sheer volume of the solution at hand and the minute changes you're making...

Using ionic grow. Zero problems with nutrient burn even though I eyeball it with a measuring jug from the kitchen and no EC meter. Plants are beautiful. I'd like to know what things like the NPK values are for solutions from the manufacturers so I can adjust them if I want. Next time round I'm...

Yeah, exactly, I should have done this, and would recommend anyone else thinking about emitters does the same. I tweaked them around for a good while recently but when flushing day came it arrived with my nemesis, dry fk'ing soil in two of the pots. They're just way too picky about when they...

stray has a good point about the dust being sucked into your tent. Even if you're really careful, you'll probably kick some of it up walking around up there. With things like cooltubes on your lamps, some of that might end up getting sucked onto the glass and lower it's efficiency. I doubt it'll...

Really quick, could use a few suggestions for pumps. Not brand names, but uses so I know where to look. I want around 1.5 bar of pressure at low volumes (misters) and something that won't die on me with high duty use. One option is a used shower pump, but they're kind of pricey and pump way...

They're in coir, the standard brick kind. It was thoroughly washed over a few days in tap water, squeezed dry, then washed in pH / nutrient balanced water and had about 30 - 50% perlite mixed in. It drains beautifully. The seedlings (about 12") were planted with mycorrhizal infected gravel...

More importantly, lumens are a measurement that was designed to rate how bright something looks to human eyes, which are most sensitive to green light; exactly the opposite of plants. So you can design a lamp with a huge lumen rating that is effectively useless for growing plants. One that gave...

It definitely works, I'm just thinking about all those tweaks and stuff people constantly make to try and get it all as simple and efficient as possible. The drippers require too much fiddling at times for me. They work, the question is, are they as easy or as effective as something else? I...

1kw in 4ft^2 tent. The height is due to them being sativa dominants (hawaiian snow, greenhouse seeds)

Oh yeah.... you wouldn't want to stab holes in the main stem of your plants if you plan on vegging and reflowering. You'd need the hole to be higher up than where you'd cut the plant back to, so it'd be gone when you put it back into the cycle. Having a syringe sized hole in the stem, or more...

I think people are just messing around with it for the novelty factor and perhaps to also make it more appealing to those that aren't used to smoking.

It's an interesting idea. I was ready to shoot it down but remembered an experiment we did at school where we put a white flower into a glass with some food dye in it. Hey presto... food dye appears in the petals of the flower. The same could be true for the flowers of cannabis. Although, you'd...

I have a 4ft square tent (about 2m high) with a 1kw super hps in there. It's in a small room that has it's door closed 24/7, the radiator is off and the window is open. To keep the temperature in the tent around 25C or lower I pull air in through a duct that goes to the window. My tent has...