My Hanna reads GH 7.0 @ 7.1 I'd set yours to 7.1 and not worry about 4.01 until you get proper solutions.
I dont know what happened i have been useing it to ph my water for awhile now.......try to think if i could of got some ph down directly on the meter some how
I dont think i seen any hanna meter juice at the grow store I'm sure i could order some.... better than coming out of pocket for a new meter ( got mine used ).
If your there cranks i got 2 questions. .. #1 is it safe to ph the water for my clones if my meter will hold at 7.01 in the 7.0 solution but go crazy if i put it in the 4.01 solution ? #2 do i need hanna solution or a new meter?
Sorry been busy... I can only guess, man. Like I said up thread, my Hanna reads GH 7.0 solution at 7.1 and it reads the Hanna at 7.01. Plus I had read somewhere about calibration solutions being different depending on manufacturer of said meter. I couldn't say whether you need a new probe or not, but were it me, I'd set it to 7.1 and be done for now. Order some hanna juice, and re-calibrate it. If it won't set/hold with the hanna juice, time to replace it. Mine was about $125. I'm real happy with it.
Take a lens out of some old sunglasses. Use it over your camera lens to get rid of those horizontal black lines.
Don't bust the first pair you find. You may need to try a few different ones to find the best filtering.
Im going to buy a new ph meter tomarrow after work. i will get the juice for the hanna too if it works then i have a back up..... i need to have one i was very temped to just to add a splash of ph down to my tap water filled res and drop my clones in the baskets on the table......
Waterproof and temperature correcting... I've dropped a few cheap ones in reses before. That ends their life... I've dropped my hanna three times now. lol
My ppm meter is water proof. ....will see what happens when i get off work . I'll see how much they want for a decent ph meter at the grow store...
Clones are in the baskets. ...hell yeah 6 grand dog Tahoe and one green crack ....not to worried about the green crack just want to see if its compatible togather ( experiment )
Going to add nutes today.....tap water is at 100 ppm maybe bring it up to 275 - 300 ppm with the GH 3 part