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As Ian has said, you need a pump. I get 100l out of mine in about 6 hours connected to my shower cold outlet. Get the highest output device you can afford.

Thanks both. @bazz Interestingally, i thought i was in a very hard water area but Severn Trend suggest moderatly hard. Just over 10 german degrees which is lower than i expected. None the less, i feel i'll benefit from RO. Not least because i'll use it to brew beer with as well :D

Hi all, Following years of jealousy over those with super soft water, I've decided to get me an RO unit. Not specifically for aquarium use butwill be heavily weighted towards it. Having done some reading yesterday I find myself a little confused. Back when i used to test my water, it was all...

Well, i think i'll do 2 experiements. 1. Sample the substrate and put it in a jar for a week. Test the fluctuation in KH 2. Do a large wa\terchange and test immediatly after. Monitor throughout the week and see how much it fluctuates. I do fint it odd that noone has had this problem before...

Yes your right, i'm confusing myself again. Incidentally, i can get my PH down to 6.45 quite comfortably with the drop checker (4kh solution) only just showing green. If you look at a kh/ph relationship table (I know they are not accurate in the slightest) i would have a co2 level of over...

Incidentally, I just found out this from my water company website (Seven Trent) Hardness 103 mgCa/l (works out again to 5.7 kh) Going on that it looks like the test kit is measuring correctly as thats identicle to what I measured yesterday. It says on the classification on there that its...

I did put 1 new bag in but the rest was old. I wouldnt have expected it to up the kh by that amount going on seachems claims. The dragon stone is a new addition but had the same high tank kh before. Its perfectly fine according to Richard at AE where I got it from.

Thanks for the reply. Its been a strange one really as i completly stripped this tank down a few weeks back so its all fresh tap water on an enclosed juwel tank so evaporation is minimal but it does occur. Test kit could be a possability although i think the massive difference between tap and...

Hi Guys, I've been curious about this for some time and really dont understand whats going on. So.. here is whats in the tank: Tropica plant substrate Seachem Onyx Sand Redmoor Wood Dragon rock A test of the tank water on the first attempt took 26 drops of a Nutrafin testkit. Thats 14.5 kh...

Well, it will be PPS pro for the moment but using all the same stuff that EI uses.

I've decided to get an RO unit from RO-Man.com and all the associated bits. Looking at a 75 gallon per day jobbie without a DI unit. I'm going to be using around 25% tap water to 75% RO water to give me a KH of roughly 4. By doing this, will I need to add any minerals back into the water? Or...