mantis and ro water

labmonkey

Active member
hi iam just about to start using mantis i have bloombox i use 35ltrs of reverse osmosis water with 0 ppm normally i use Orca Liquid Mycorrhizae @ 5mls per 20L of water . and Sensi Cal-Mag Xtra at a rate of 2ml per litre is this correct or any advice would be appreciated
 
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R.Whitebear

Well-known member
All you need is the mantis all that other crap will mess with the PH buffer in the mantis. Mantis has everything you need to drain and start again then once a week I add 10 ltr of water with 50 ml of mantis thats all you do no need to drain. I sometimes do a full drain and fill when I turn to 12/12
 

labmonkey

Active member
so fill tank with ro water add 5mls per ltr of mantis and dont use any cal/mag or Orca Liquid (hydroguard alternative) and top up once a week with 10 ltr of water with 50 ml mantis
 
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labmonkey

Active member
plants are now in veg in mantis nutrients and they are now yellowing
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labmonkey

Active member
PH WAS 5.2
The ph now is 5.4 in mantis for 24 hours
 

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R.Whitebear

Well-known member
What's your PPM should be around 500 and add PH up until 6.1 also if your using LED lights turn to half-power. Do you have something circulating the water in your res that's very important with Mantis?
 

labmonkey

Active member
PPM 640
LED LIGHTS ARE AT 50%
CHILLER CIRCULATING WATER
O2 GROW
(i also have a small pump in tank for extra circulation if needed but off at the moment)
left pic is return pipe from chiller right pic extra pump if needed
 

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R.Whitebear

Well-known member
if you can add some more water to get that ppm down to 500 that’s a bit high for those little guys it would be alright for 1st week of flower and if all the pots where full maybe take some water out if need be Mantis is very concentrated so a little goes along way
 

R.Whitebear

Well-known member
Good 5.6 is in the good zone now it should stabilize to 6.1 if it doesn’t I notice you said your RO water was o PPM mine is at 3 PPM you need a little bit of something for the PH buffer to attach it self to so you could add some tap water they say u can use any type of water so give that a try till you get it all dialed in good growing
 

labmonkey

Active member
Hailea 100A with inline filter
1/20hp
100ltrs cooling capacity
Maxi jet 750 water pump
And 13mm insulated chiller hose
 
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