Hard water and calmag

I started growing with tap water before I understood it was what was causing most my plant issues. I would stay away from it if possible, theres other crap in there as well that's not good. Maybe your standard house plant won't mind but you don't need to be making your life harder when trying to get some good buds. Yeah, people say marijuana is just a weed, but it's a damn picky one in my opinion. Baby her and she will reward you.

In the country I live in, tap water is suitable for humans, but not for plants. I've tried it about 5 times, and the plant always got blocked due to the accumulation of unnecessary substances. My water ppm from the tap was 350. I bought a filter from Amazon for 50 euros, after filtering, the ppm remains at 20, which is great!!!!! The filter has been in service for 2 years and performs its function perfectly, so if you have such a problem, I advise you to buy it :).

Ca/Mg cap is around 140/70 ppm i gave my clones +47 ppm of Ca and now they got lockouts so adjust ur ppm perfectly (try first 1/4 1/3 or 1/2 calmag dosage)

The calcium and Mg in hard water is not available to the plants. its in the form of oxides or carbonates. Need strong acids to break em down. Best to add in anyway.

oh and pH-balance that tap after you add your fertilizer... even if in soil it's wise to do. Most likely need an acid of some sort. White distilled vinegar is fine, cheap and readily available. get one of those 1-3mL pipettes for doses in the single-digit gallons range... if mixing up 50-100gallons... get a larger measuring option.

Thats essentially why most fertilizers never come with cal and mag, it leaves the choice up to the grower, depending on how hard your water is. A completely coco system (coco fiber substrate, along with coco-specific nutrients), moderately hard to hard water is generally best. But In soil you will need to play the game. Here is the thing. The recommended ratio of calcium (Ca), magnesium (Mg), and potassium (K) in soil for optimal plant growth is generally around 65:10:5 (Ca:Mg:K), meaning that calcium should make up about 65% of the exchangeable bases, magnesium 10%, and potassium 5%. This ratio can also be expressed as 13:2:1. Tap water will have anywhere 3:1 upto 8:1 calcium and magnesium. With little to no K. Calcium is immobile inside plant, means it needs to be made available constantly over time for new growth. Especially early flower formation. Magnesium is mobile. If you adjust the pH before adding nutrients, the nutrients themselves can alter the pH, requiring further adjustment, it's all a big pain in the arse tbh. Your tap water should be enough for prolonged periods to provide the calcium she needs but eventually she will show signs of deficiency luckily calcium and magnesium shortages are visually easy to recognize and so long as you keep tabs on your ph in the soil when your ph is getting close to 6.2 then you know cation calcium that likes to make up 65% in soil is starting to run low. Next time you get money buy yourself a soil ec metre. This way you can get instant idea of how much salts are In your medium and how close you are to being full. Using ph you can ballpark cation ratio. Right now I think your medium is jammed with ca and mg and you will need to possibly leech to reset until you get within good ec range then apply ph balanced water with desired ratio of ferts for your stage of growth minus any calmag supplements. Right now your run off is coming out higher than what's going in. With those 2 metrics and a little understanding, all problems become simplified. With that I wish you the very best of luck with your grow. If there is anything else the big happy family at gd can help you with let us know and I might write you a book 📖 😉. Gluck mucker.