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#1
11-13-2009, 03:47 PM
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Yes I remove all the desired amount of water I intend on replacing first before I add any new water to the system and I picked up a rubber tub last night and just looking for an old powerhead to make the water changes more affective. Yes the way I do things is lots of work but I do not have lots of room in my condo to have a fancy setup.
I stopped using tap water and started using purified bottled water (the 5 gallon jugs that you fill up at the grocery store) about a week ago and never had any problem with that water. Is that bad water to be using for my thinking was if it is purified and good enough for me to drink why not them? 
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#2
11-13-2009, 04:47 PM
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Using the grocery store water is a good start, but ultimately it's going to be another chore and expense that would be better addressed by getting an RO DI system. I'm pretty sure that the water from the store is RO (reverse osmosis) only and it will still have some TDS (total dissolved solids) in it. The DI (de-ionization or demineralization by ionization) stage of a RO DI system will bring the TDS of your water to 0 so you're mixing your salt in absolutely pure water. Check out some of the threads and info on RODI systems and you will find plenty of information. The initial investment may seem costly and although I don't know what your store charges for the bottled water, in the long run you will have better results and save money with your own RO DI system, especially with a 72 gal tank. The trips to the store for water will get old fairly quickly. As mentioned I do fairly large water changes on my 77 gal, about 25 gallons each time and I would not enjoy hauling that amount of water from the store every few weeks.
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build  http://www.canreef.com/vbulletin/showthread.php?t=82206
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#3
11-13-2009, 05:13 PM
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Just a few thoughts to throw out there.
Do you have a ground probe. Maybe you have a short somewhere it will kill your fish. What about that prime you added maybe it is a bad bottle and the chlorine killed them. Also having the circulation off for the water change dropped your oxygen levels to low. Just some things to think about.
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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller 180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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#4
11-13-2009, 05:14 PM
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Perhaps I read wrong, but one thing that struck me is that you said all the fish are dying/dead but the corals all remained fine?
I've had SPS corals survive out of a bag that reeked of death and were probably off the chart in ammonia - but fish would have been dead in that water for sure so maybe you had an ammonia burn or something similar due to stirring up crap, and also having a lower total volume (due to water displacement by the buckets of water). Maybe you had a dissolved oxygen issue also? I find that a lot of mysterious mass deaths in the night can usually be attributed to DO issues. That being said, this is one of those "crashes" where the source is going to be difficult or impossible to pinpoint. But a better water change regimen would be a good place to start.
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#5
11-13-2009, 05:33 PM
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The deaths did not happen during the water change so having the flow off I still don’t see the chance of that being what was the cause. I tested for ammonia as soon as I had noticed it and found nothing on my tester and same with the chlorine testing. Im thinking from everything people have suggested is that I had too many fish in my tank for the age of it and to be aquascaping and playing around in my tank shook the ecosystem too much.
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#6
11-13-2009, 06:20 PM
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just wondering, what is your turnover in your tank? how deep and what size of sand do you use? are you running a skimmer? do you know how long was it between you moving your rocks and the fish gasping? and what was your PH after the crash?
Last edited by FitoPharmer; 11-13-2009 at 06:22 PM.
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#7
11-13-2009, 06:30 PM
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Im running currently a fluval 304 (I have a larger pump just not fitted yet) and I have a powerhead that runs 1600L/H no sump.
The tank is a 72 gallon bow front (48”L 24”H 12”W) I have about 60 pounds of like rock and about 40 pounds of fine sand (cant recall for sure how big the bags were). Currently not running a skimmer im still trying to find one. I finished moving all the rock around 14:00 and found them in trouble around 22:00. My PH has never moved its always been 7.8 - 7.9 (that was tested as well after the wreckage).
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#8
11-13-2009, 06:46 PM
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the 305 fluval, i guess the 304 is the older model, is 260GPH.
and the 1600 L/H power head is 400GPH. 660 for a 72 is less then 10X turnover very bad for accumulation in sand bed. did you run your fluval with or without media? and there wasn't any other circulation? 20X+ is best for reef tanks.
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