To anyone considering city tap water...

mnowicki

New member
Quick story:
I started using just dechlorinated tap for the first few weeks while cycling and being short on cash but wanting to get into the hobby. Figuring, having one of the highest city taxes, my tap water has gotta be pretty good so I should be in the clear especially with so many people using just tap.... how wrong i really was...

Last week santa came early and i got a 5 stage ro/di unit. I did a significant water change (80+ gallons), essentially all my water (don't have livestock yet, still cycling). My filters seemed fine and less than 1/10 of my DI resin showed signs of exhaustion. However, last night i was filling up a tub that i keep extra water in if needed. Within 5-10 gallons of filling it I looked at my ro/di unit and the first coarse sediment filter was a rusty orange color!! I couldn't believe it. Sorta got me mad that my brand new filters were getting used up so quickly, but really opened my eyes to what could possibly be in the water we drink. I feel as if i was still using just tap water all that sediment would've killed my fish once i introduced them into the tank (whatever it was). The other thing was that to just the naked eye you wouldn't be able to see this, cause i poured some water into a glass and it seemed crystal clear as always and drinkable. Also this was just my first sediment filter, i can't imagine how much smaller stuff got by that, is now stuck in my carbon blocks, and my di resin is nearly 1/5 exhausted.

On top of the convenience of being able to simply run a small plastic line into the room you have ur tank in, instead of mixing water, carrying buckets to top off, refill, etc. the peace of mind that the water going into my tank isn't going to kill my fish off is so worth the $160. If i were doing it again, i wouldn't of even started without an ro/di unit and made sure i had enough money for this before beginning the hobby... I guess this hobby really is about patience, every aspect of it. Its a risk one takes and it seems like the majority usually suffer no big consequences, but the amount of time that is saved in itself over time is well worth the added expense imo now.
 
Quick story:
I started using just dechlorinated tap for the first few weeks while cycling and being short on cash but wanting to get into the hobby. Figuring, having one of the highest city taxes, my tap water has gotta be pretty good so I should be in the clear especially with so many people using just tap.... how wrong i really was...

Last week santa came early and i got a 5 stage ro/di unit. I did a significant water change (80+ gallons), essentially all my water (don't have livestock yet, still cycling). My filters seemed fine and less than 1/10 of my DI resin showed signs of exhaustion. However, last night i was filling up a tub that i keep extra water in if needed. Within 5-10 gallons of filling it I looked at my ro/di unit and the first coarse sediment filter was a rusty orange color!! I couldn't believe it. Sorta got me mad that my brand new filters were getting used up so quickly, but really opened my eyes to what could possibly be in the water we drink. I feel as if i was still using just tap water all that sediment would've killed my fish once i introduced them into the tank (whatever it was). The other thing was that to just the naked eye you wouldn't be able to see this, cause i poured some water into a glass and it seemed crystal clear as always and drinkable. Also this was just my first sediment filter, i can't imagine how much smaller stuff got by that, is now stuck in my carbon blocks, and my di resin is nearly 1/5 exhausted.

On top of the convenience of being able to simply run a small plastic line into the room you have ur tank in, instead of mixing water, carrying buckets to top off, refill, etc. the peace of mind that the water going into my tank isn't going to kill my fish off is so worth the $160. If i were doing it again, i wouldn't of even started without an ro/di unit and made sure i had enough money for this before beginning the hobby... I guess this hobby really is about patience, every aspect of it. Its a risk one takes and it seems like the majority usually suffer no big consequences, but the amount of time that is saved in itself over time is well worth the added expense imo now.


You might want to check your TDS before and after your membrane. I wouldn't think your DI resin should be 1/5 exhausted so soon.

I've been using the same resin for almost a year and I'm still getting 0 TDS after the resin. I average 1-2 TDS after my membrane.
 
+1 on the above. If you are going through your filters that fast then your TDS is really really high prior to coming into the filter. Usually you sediment filter and carbon blocks are for for 6 months and DI for 12 months on average. Membrane good for 2-3 yrs. I have a 125 tank plus I use the RO side for drinking water and still my filters hold up strong.
 
Figuring, having one of the highest city taxes, my tap water has gotta be pretty good...

1. Make sure you're not on a well.
2. Get your water utility's annual water quality report.
3. As others said, check your source. You shouldn't use DI resin that fast unless the pre-filters and membrane are bad or incorrectly working, even with abysmal water quality.

Jeff
 
yeah i used tap water to start in my 29g. it didnt cause any problems with my fish it just gave me algae problems so i switched to RO/DI
 
You do know you're supposed to run them for the first 30-60 minutes and throw out all the water right? You could just be seeing the filters getting 'conditioned' for use.
 
That's fast for DI depletion, and I agree that I'd check the TDS, preferably at the tap, after the membrane, and after the DI.

The orange likely is rust, and it's not harmful to humans, so municipal water treatment doesn't seem to remove it. My filters turned orange after a while, too. Not as quickly as yours, though.
 
i change my prefilter ans matrix carbon units every six months , my membrans and di canister is almost two years old and i am still at 0.0 tds . something is weird as you di is being used up ,i would recheck the di cartridge as it may just be getting broken in as brian has stated
 
My TDS was 44 the last time I checked it... Tap 4 foUrteen years without any problems...

FWIW.
 
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