Need some advice

[Cobain420]

I wouldn’t bother with distilled if your tap water is 30, that’s pretty soft for sure. I let mine sit for a couple of hours to aerate and let any chlorine evaporate. My tap water will range from 0-30ppm as well.

I basically follow the 10-part GH schedule, gradually working my way up to 100% of the light schedule. It’s easier to figure out what you should be scaling because GH gives their ppm on their charts, e.g, late bloom is 500ppm on their light schedule. Late veg is 750ppm so I typically scale that to 50%.



According to @Mañ'O'Green ‘s nutrient sticky (great read, btw), your plants should be getting 80ppm of calcium I believe. You can try do the math to figure out how much you should be adding. Your community may have a water report available that says how much of that 30ppm is calcium, and then you can find out how much is coming from the Flora Micro, then the balance (if needed) can come from Cal-Mag.

Having said that, it sounds like yours and my situation is very similar in that we both grow in Pro-Mix with GH nutes and have 30ppm tap water lol. So here’s what I do: I scale Cal-Mag the same as any other nutrient. My last feed was 50% everything on the 10-part, Cal-Mag included. My first time in Pro-Mix I started feeding 100% Cal-Mag right off the bat and scaled the other nutes and I ran into problems. It’s best to keep things balanced, however, GH does say that you can scale Cal-Mag different than the rest if you need to — just be aware that Cal-Mag is also a source of nitrogen, so the more Cal-Mag you add, the more you change your N-P-K ratios by bumping up nitrogen. This is why in my opinion, you might want to look into the 6-part nutrient schedule, as that one includes Cal-Mag within a fully balanced regimen.

One final word of advice, use a quality pH pen that you maintain and calibrate regularly. The cheap Amazon ones simply will not do.

Ty you are quite helpful. One last questionI forgot to ask.Should I ph my water when I don't use nutrients?

 

[tronN00dles]

Ty you are quite helpful. One last questionI forgot to ask.Should I ph my water when I don't use nutrients?

No problem. And absolutely yes. Nothing should be going in those pots outside of the 5.8-6.3 range. I’ve been pretty steady at 6.2 this grow and things are looking great.

 

[Cobain420]

Ty you are quite helpful. One last questionI forgot to ask.Should I ph my water when I don't use nutrients?

Also I had cal mag here but not the hg brand. Saw that the 2 don't put exactly the same amount of cal mag iron ect. . So for tonight gonna give them only cal from the brand I got at home and wait for the GH to get here in 2 days . Sound good?

 

[Cobain420]

From my phone It seems your leaves are a bit slightly yellowish or It Is my impression?
Only on the tip zone

Just white and the little one got some kinda rust spot on one

 

[tronN00dles]

Also I had cal mag here but not the hg brand. Saw that the 2 don't put exactly the same amount of cal mag iron ect. . So for tonight gonna give them only cal from the brand I got at home and wait for the GH to get here in 2 days . Sound good?

Be careful with that, as like you say, the ratios are different. I’d be less concerned with things like iron and more concerned along the lines of N-P-K numbers. GH Cal-Mag is 1-0-0 for example.

I personally use a non-GH brand of ArmourSi, but they both contain 0-0-4 so I don’t really worry too much about it. The brand I use actually has marginally less silica but I treat it as the GH stuff, again, to keep my N-P-K levels consistent. If I were in hydroponics I probably wouldn’t do that though. Tbh I'm not even sure peat really needs silica anyhow; pretty sure soil doesn't. Again, it's simply because I use the 10-part line up, which contains ArmourSi, so I if I didn't use it I'd be throwing off my potassium levels.

 

[Cobain420]

Just white and the little one got some kinda rust spot on one

 

[Cobain420]

Be careful with that, as like you say, the ratios are different. I’d be less concerned with things like iron and more concerned along the lines of N-P-K numbers. GH Cal-Mag is 1-0-0 for example.

I personally use a non-GH brand of ArmourSi, but they both contain 0-0-4 so I don’t really worry too much about it. The brand I use actually has marginally less silica but I treat it as the GH stuff, again, to keep my N-P-K levels consistent. If I were in hydroponics I probably wouldn’t do that though. Tbh I'm not even sure peat really needs silica anyhow; pretty sure soil doesn't. Again, it's simply because I use the 10-part line up, which contains ArmourSi, so I if I didn't use it I'd be throwing off my potassium levels.

You got any good ph meter to recommand mate ?

 

[tronN00dles]

You got any good ph meter to recommand mate ?

BlueLab all the way.

 

[Frank the Dank]

For what it’s worth….. I use promix and spring water (from the store) …. I don’t add any nutrients until day ten, and I don’t think promix has nutrients in it. I can’t make out any white spots that you’re talking about….and the brown spots are most likely “lensing” , caused by tiny droplets of water left on the leaves, that act as a magnifying glass when exposed to the light. I would be very careful chasing deficiencies at this stage. Just my two cents, though.

 

[Mañ'O'Green]

@Cobain420 You should not need any additional Calcium for the entire grow with the Dolomite Lime in the Pro Mix. You probably did not need to fertilize at all for the first week and then start with 50% strength BALANCED nutrients on every 3rd or 4th watering. Please read this about balanced nutrients.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org