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The aqua safe systems off ebay are used by many marine aquarists. You will find them mentioned on several forums across the internet and people who have had their unit for years. They are one of the most commonly mentioned RO units. I ended up with mine because it was recommended to me on 3 different forums several times over and I couldn't find anyone that had anything bad to say about them. Filterdirect probably comes in a close 2nd and is also sold on ebay. The units sold by aquarium companies are at best way overpriced and sometimes contain cheap parts. For what you'd pay for that pure flo unit you could get one off ebay of just as good of quality that can produce 3 times as much water(150gpd).

dont the water quality go down with more gpd?

http://www.cardomain.com/ride/2571255/2

The water quality doesn't go down from my experience. I have a 100gpd unit. I get 0-2ppm TDS(Measure of purity - mine's about as good as it gets) all the time. I'm pretty sure it's a completely different membrane/housing, that isn't interchangeable and somehow compensates.

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Critical Fertilator: The Micromanager of Macronutrients

Well i added 40lb of live sand and the first 2 days didnt do anything shot up to 60 then changed water 20 gal, Then the past week it has been going down and down i like to beleive this is true but i find that this cant be right! What you all think? started from 40 all the way down to 15 now over the last 4 days usally it would be off the charts now! Also i stopped using amquil just so that didnt throw me off!

Also do you all think i should add a little more then? I got about 3 3/4 to 4in in some spots i figure another 20-40lb would put me at a nice 5-6in

http://www.cardomain.com/ride/2571255/2

A dsb of 3" or more can help reduce nitrates to a point. There are a few things to keep in mind when setting one up though. Try taking a look at some of these articles.http://www.wetwebmedia.com/deepsandbeds.htm
dsb.html" rel="nofollow" target="_blank">http://www.reef-aquarium.net/resources/rocksubstrate/dsb.html
http://www.reefkeeping.com/issues/2003-06/rs/feature/index.php

thanks i have read alot on it before and know a little but thanks for the links as i read them i just dont know should i get more or not? Also my nitrates have been holding at 20 for the last 4 days so there not dropping anymore so i donno?

http://www.cardomain.com/ride/2571255/2