planning to get a rain water tank on my shed, and in good old england we get plenty of rain
rain water good to water with ?
(sorry if this is wrong section)
EDIT : Title should have been "Watering with RAIN water" lmao
Full Version: Watering with rain water?
Rain water is the best.
QUOTE (Chilli @ Aug 6 2009, 06:35 PM) 
Rain water is the best.
ok cheers man
think a 100L tank will be fine ?
Hi,i use rain water filtered through a pair of tights.So far so good anyway.
should be fine i think...
thought you were taking your grow on holiday......
train water....
I use rain water as well it has a natural ph of 7 but when you add Rhizotonic to it it shoots up to 9.5 or so and is a right barsteward to stabilize at 6.0 again 
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cheers guys 
QUOTE (speedemon @ Aug 6 2009, 06:39 PM)
I use rain water as well it has a natural ph of 7 but when you add Rhizotonic to it it shoots up to 9.5 or so and is a right barsteward to stabilize at 6.0 again .
.Actually, rain water is typically around pH 5.5 but it's really a difficult one because there's nothing in it - i.e. no electrical conductivity to measure.
Rhizotonic is strongly alkaline and so will push the pH of anything up!!!
If anyone is going to use rainwater, make sure to add cal mag/epsoms to your regular feed (or use a soft water formulation). Remember, rain water is for all intents and purposes distilled water, so it's pure and has very little in it. It makes a GREAT flush, but if you're in coco be careful to supplement with calmag.
GN
Clean rain water is fine...
Don't test the PH of mine though.......could be wrong.
JOM
Don't test the PH of mine though.......could be wrong.
JOM
QUOTE (Amnesia @ Aug 6 2009, 06:36 PM)
Hi,i use rain water filtered through a pair of tights.
Too much information,
It hasn´t rained here for 2 months, and won´t rain again for at least another month. You are lucky to be able to collect rain water - tap water is my ONLY option.
Just a quick note from OT1 about using rainwater.
Kapusta
Kapusta
QUOTE (oldtimer1 @ Jun 15 2007, 06:01 PM)
A few points:-
Rain water is fine, but it may contain spores of pythium, verticillium and the like, as do some mains water supplies, they thrive in anaerobic conditions.
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated, especially if the water temperature rises above 68f 20c, as dormant pythium spores will start germinating above these temperatures.
Its true cold water shocks plants, and round 20c is close to ideal, but it is best if it is fresh or an air stone is used to keep it aerated if stored for more than an hour or so. There is absolutely no reason for not using a mix of hot and cold tap water, the hot water will actually have a lot less carbonates than the cold water, but will hold less oxygen so filling your can with a shower head helps add oxygen and can be used immediately.
You may get away with storing water for days on end for several grows without grief, but sooner or later pythium will strike, you really don’t want that to happen. If you want to store water for over an hour or two, get an air pump/stone, it only costs a few quid and will save a lot of grief at the end of the day.
Rain water is fine, but it may contain spores of pythium, verticillium and the like, as do some mains water supplies, they thrive in anaerobic conditions.
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated, especially if the water temperature rises above 68f 20c, as dormant pythium spores will start germinating above these temperatures.
Its true cold water shocks plants, and round 20c is close to ideal, but it is best if it is fresh or an air stone is used to keep it aerated if stored for more than an hour or so. There is absolutely no reason for not using a mix of hot and cold tap water, the hot water will actually have a lot less carbonates than the cold water, but will hold less oxygen so filling your can with a shower head helps add oxygen and can be used immediately.
You may get away with storing water for days on end for several grows without grief, but sooner or later pythium will strike, you really don’t want that to happen. If you want to store water for over an hour or two, get an air pump/stone, it only costs a few quid and will save a lot of grief at the end of the day.
QUOTE (Kapusta @ Aug 7 2009, 04:18 PM)
Just a quick note from OT1 about using rainwater.
QUOTE (oldtimer1 @ Jun 15 2007, 06:01 PM)
A few points:-
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated,
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated,
My water sits for a day to get rid of dissolved chlorine. No idea how I averaged 18 ounces a plant (dried) on my last grow.
QUOTE (cantharis @ Aug 7 2009, 05:00 PM)
QUOTE (Kapusta @ Aug 7 2009, 04:18 PM)
Just a quick note from OT1 about using rainwater.
QUOTE (oldtimer1 @ Jun 15 2007, 06:01 PM)
A few points:-
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated,
All water allowed to stand for more than an hour or so will loose dissolved oxygen and should not be used to water plants unless its oxygenated,
My water sits for a day to get rid of dissolved chlorine. No idea how I averaged 18 ounces a plant (dried) on my last grow.
Thats probably because of where you are growing outdoors - you have very hot weather and so need to water every day - your roots are getting oxygen because the medium is drying out quick. Most indoor growers are looking at a much longer watering frequency therefore standing water is better if oxygenated.
Hi manxy2
are you where i think your from?
hb
are you where i think your from?
hb
Hi guys,ive recentley turned to using rain water,and am having a few problems (my plants dont look as good as when i was using bottled water) on my last couple of grows.Im not ajusting the ph as im growing in bb light mix.
My rain water is bottled up and kept (stood still) at room temp for a week or so before i use it,im thinking i need a air pump or air stone to keep it moving has anyone got a link or a proper name to ask for these as i havnt a clue what they look like or what to ask for or where (an aquarium maybe).
Also were i live there are a lot of sea gulls and the land on my roof probabley shitting all over an then it will get washed off in to my water butt, will this effect the water in a negative way or should it be fine? thanx for any advice. danjaman
My rain water is bottled up and kept (stood still) at room temp for a week or so before i use it,im thinking i need a air pump or air stone to keep it moving has anyone got a link or a proper name to ask for these as i havnt a clue what they look like or what to ask for or where (an aquarium maybe).
Also were i live there are a lot of sea gulls and the land on my roof probabley shitting all over an then it will get washed off in to my water butt, will this effect the water in a negative way or should it be fine? thanx for any advice. danjaman
QUOTE (Danjaman @ Aug 14 2009, 02:22 PM)
Also were i live there are a lot of sea gulls and the land on my roof probabley shitting all over an then it will get washed off in to my water butt, will this effect the water in a negative way or should it be fine? thanx for any advice. danjaman
interesting points about the mg missing from rain water and the seagull shit well I wouldnt have thought of that will await a response with bated breath..
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