Gambling with there lives?

[nfored]

I user R/O water, and never use any declorinators, The water passes through 2 carbon blocks, the membrane and then 2 DI resin chambers.

First Carbon: granular activated
Second Cabon: 5 micron coconut carbon block filter


I normally only do 10 to 20% W/C once a week, and have yet to see any bad results, The only time I have used any declorinators is when I did major water changes in the 40% or greater range. I have only been using this setup for about 2 months now, I will change the carbon and DI filters every 6 months and the membrane every year.

 

[Dr Joe]

Do you pre-filter the garbage (sediment etc.) out first? Otherwise it sounds like your good to go, just don't exhaust the carbon filters prematurely (no indicators ).

Dr Joe

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[fishdance]

Actually at 10% water change once a week, you wouldnt need any de-chlorination/filtration at all so your pretty safe.

 

[Dr Joe]

so the chlorine goes where?

 

[fishdance]

Come on Dr Joe. You are an experienced fish keeper .... it doesnt go anywhere but 10% water change contains so little chlorine/chloramine that it is diluted enough (over 90% of the tank) not to harm any fish and will have broken down by the time the next water change occurs. Do a test with some sensitive fish like tetras or fry is you really need to.

 

[nfored]

I have read many place about 10% not being a problem, sorry yes this is a 6 stage r/o filter a 5 micron sed filter, 2 carbon filters, r/o membrane, 2 DI.

 

[justin guest]

Come on Dr Joe. You are an experienced fish keeper .... it doesnt go anywhere but 10% water change contains so little chlorine/chloramine that it is diluted enough (over 90% of the tank) not to harm any fish and will have broken down by the time the next water change occurs. Do a test with some sensitive fish like tetras or fry is you really need to.

If the town mains gets a chlorine boost (does happen sometimes) then you just knocked off your tank. Of course it may never happen while you´re doing a water change and I agree normally 10% a week should be biologically bound up without a problem but I have seen it happen. I´ve often dosed chlorine in aquarium systems to combat bacterial fish diseases as an alternative to antibiotics (don´t do this with neons) and it works fantastically as long as you shut down the biofilter the first hour. This may mean a few of you have to rethink your views on chlorine. Call me an idiot if you will but i was overseeing at least 300 different systems and never had any problems. Water changes were always done with drop or trickle flow systems so spikes of chlorine were never a problem. Doing a one off water change of 10% could be dangerous though. Why then do I dose chlorine as a medication and not worry... I know what the dose is. Knowledge is power in this case. I wouldn´t recommend dosing chlorine without prior knowledge however. As for chlorine becoming a standard medication... it is used for this purpose widely in Germany. One reason we resorted to using chlorine is because some fish imports especially from Asia were already immune to ALL antibiotics! Why? Well if you fertilise a pond with chicken s%&! to make a green water culture to breed infusoria and water fleas to feed livebearers, and the chickens have been pumped full of antibiotics beforehand... well you hopefully get the picture
So would I prefilter my tap water? Only if i was doing bulk water changes as opposed to a constant drip system
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