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What's a good Ro system and tds pen to get?


Ziek

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So I'm looking at setting up a shrimp rack like BB's latest one. It's quite a ways off need to move first and wait for my child to be born but slowly it's going to come together. Anyways I'm looking at what a decent RO system would cost and what one to get and I need to get a good tds pen so I can start testing my current tank but unsure where to get one from. Would anyone be able to help me out?

Thanks,

Josh

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Hi Josh

I'm just new to keeping shrimps like yourself therefore have little experience...I have been searching myself for a TDS Pen after reading Bluebolts thread on TDS and the link... Saw on ebay a HANNA INSTRUMENTS - HI-98129 - LIQUID TESTER, PH/EC/TDS/DEGC for round $250 and delivery of $45 from UK...Suppose to be a top quality instrument...

About RO system,;) also looking into that as well...Not to sure on price (my guess approx. >$ 1000 supplied and installed)...Hope this give you some idea and would be great if some other members add some info...CJ

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In regards to the RO systems it really depends in how much RO you want to produce in a day and if you want it permanently fitted or portable. I myself have a powered 6 stage RO unit that does the job for me, a couple of people I have spoken to have got a 3 stage as it was a cheaper option and it still creates the same RO water with 0 TDS only they produce a less as they are mains pressured and have a lower rated RO membrane.

R/O units start off at under $100 on ebay but this may be a case of you get what you pay for in terms quality of the parts or filters. I recommend contacting our forum sponsors to see how they can help you as you will no doubt get a great product but also great support.

In regards to the EC / TDS pens, I have the same Hanna unit (98129) that you mentioned. It's a good unit but takes a while to get an accurate PH reading, this could just be mine though as the probe was dry when I received it. The PH meters do need to be calibrated regularly to keep them accurate. I got mine from amazon and it was around $130 delivered however Hanna Australia will not assist you at all if you don't buy them locally, so that's up to you.

Now in saying that, some of our sponsors sell EC & PH meters as well. I was recently visiting another SKF member and he asked me to bring my meter with me so that he could confirm that the PH and EC meter that he purchased from Aquakits were accurate and there was pretty much no difference between his and mine. So that is also a very good option.

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I got mine from Peter at PSI filters. They are Australian, comes with australian warranty and all replacements parts can be sourced from them. Most of the marine hobbyists get their RO systems from him and he's always willing to answer questions.

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