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Home      Reply		Viewed: 297 -- Replies: 15
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Posted	r.o water
01-12-2007 16:05 by Ed	Does anyone up in cruise hill sell RO water,have to be honest they are miserable bxxxxxxx up there.
02-12-2007 00:16 by stuart	Yep i know what you mean somee of them can be!!! Wildwoods Home marine Definately sell RO. waterworld just down the road on the A10 also sells it.
02-12-2007 09:54 by mwilde	how much do you pay for RO? I cant understand why people buy it when a RO filter is less than £100.
02-12-2007 13:05 by mark770	I pay £2.50 for 25lts. To get this volume, I would waste approx 75lts down the drain. As I am on a water meter, I would much rather my lfs take the hit for the waste! More economical sense for me
02-12-2007 13:21 by telboy	ED,home marine do plain RO at £1 per gallon,or salted RO at £2 per gallon
02-12-2007 13:23 by Ed	Thanks everyone,home marine the most miserable of all the shops and most exspensive.
02-12-2007 17:29 by big cats	i had no idea ro wasted so much water? i wouldnt use it , cant you recycle the waste water ??
02-12-2007 19:53 by mark770	no good for me to use the water in fishkeeping. Tried to use in water changes once and never again after very nearly loosing about 20 discus. OK for using in the garden or washing the car, used to be ok for topping up my garden pond when I had it. Otherwise it was literally money down the drain
02-12-2007 19:53 by mark770	no good for me to use the water in fishkeeping. Tried to use in water changes once and never again after very nearly loosing about 20 discus. OK for using in the garden or washing the car, used to be ok for topping up my garden pond when I had it. Otherwise it was literally money down the drain
02-12-2007 23:10 by robert.pope	its great if your not on a water meter! Hma filters dont have any waste water and remove heavy metals and stuff but leaves the good minerals it does nothing to lower the ph or soften the tap water. so if you live in a soft water area you can use HMA and forget the Ro Ro needs buffering to stabalise the PH
04-12-2007 12:35 by Alan	mark770 why would you use waste water with discus. Surely if you keep discus and have an RO unit you use the product water with the discus as discus are very sensitive of heavy metals which would be more concentrated in the waste water from an RO unit. Also what prefilters were in place before the membrane on the RO unit?
04-12-2007 13:48 by Ray	I use the waste water in my discus tank to raise the mineral content of the RO water.I also use it for water changes in my malawi tank.There should not be any heavy metals in the vented water as it has passed through a carbon prefilter,which remove chlorine,chloramines and heavy metals,which I belive would destroy the tfc membrane,it is wrong to call this WASTE water it is only slightly harder than tap water and is cleaner than tap water and perfectly safe for drinking and cooking so should not be wasted.
04-12-2007 16:05 by Alan	Just recieved this note from a well respected RO unit retailer. The Question I am considering collecting the waste water from my 6 stage RO unit to use on my freshwater fish tanks, would this be safe to do? The unit I use is the ***** 6 stage 100 gpd system; I use the purified water to mix salt water for my marine aquarium. Considering the water will have been filtered by 2 carbon filters and a 5 micron sediment filter before being rejected by the membrane I think this waste water will be a considerable improvement over straight tap water and a dechlorinator which I currently use although I am aware that anything that gets through the carbon membranes in its entirety will be concentrated through the rejection by the membrane. Advice regarding this would be greatly appreciated before I take the plunge and try it. In order to make an informed decision it would be good to know what chemicals and metals etc the carbon and sediment filter may reduce or remove, am I right to conclude that they remove chlorine and chloramine entirely in order to protect the membrane. The Answer Your waste water will be largely free of chemicals, metals and organic compounds so will certainly be better than tap water. Its mineral contents and its levels of phosphates/nitrates will be some 30% higher than your tap water though, and the problem is in knowing what those minearals are and at what levels to start with. If you are in a soft water area then it is unlikely to be any problem, but if you are in a very hard water area it may cause issues. Without getting a full water analysis done(and even then your tap water constituents will change at different times) it is impossible to give definate advise. As with a lot of things it may be something you just have to try and see how it goes. If you were to mix your waste water with about 20-30% water that has been through your dechlorinator then you would be at much the same level as you started with, mineral wise Sorry I cannot be more precise, but I hope this helps best wishes The helpdesk team. I think that clears a lot of things up I am fortunate to live in a soft water area with undetectable nitrate in my tap water.
04-12-2007 16:10 by Alan	I will be saving a bit of dosh on dechlorinators once I get the container set up in my garden to hold all the waste water. I reckon in 6 months the changes I make will have paid for themselves.
04-12-2007 16:11 by Alan	I also will avoid the problems associated with ineffective treatments caused by the use of dechlorinators. Marvellous.
06-12-2007 14:55 by JDOWNING	Cant help with the RO water supply Ed, but your right about how miserable and unhelpful these water gardens are, in particular, that lot at Wildwoods. It seems to be something to do with the trade, I suppose unless you are about to spend a few hundred quid they dont really want to know you. :

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