So, I just set up my new RO system using a Rubbermaid 44 Gal trash can as storage - The float valve didn't get here in time, so I just ran the system overnight and watched it this morning till it was about full. I used my pump I've been using to transport the water from a Home Depot 5 gal bucket into the tank to get some movement in the water so I could add my GH booster and baking soda and it would mix up. I also put the heater from my fish tank into the can to warm it up, as I noticed the water was quite chilly (can currently sits outside until float valve comes in).
After about 2 hours the water temp was about 72 ish; my tank is normally around 77, so I figured 5 F wasn't gunna harm much if anything...
PH, KH were a little higher than I wanted in the trash can: 8.1 PH and 6.5 dKH
GH was correct: about 4 dGh
my normal PH (degassed) is around 7.6-7.7
KH is 4-4.2
GH is 4.1-4.2
I had already started to drain water from the tank so I started to put the water from the trash can into the tank - using the sump pump and 20 feet of the same clear 16mm tubing I use for both my canister filters. 40 gallons worth.
As I put the water in, I was watching the tank making sure that the force of the water coming back in wasn't going to uproot anything. As the tank was over 75% full I turned on the CO2 and one of the circulators. The last 10 or so gallons the fish [that died] all started to swim around erratically and into each other/objects, up to the surface like they were out of breath, then dying - all within about 2 minutes. They all seemed fine and were swimming around the whole tank until those last few inches of aquarium top off. I didn't know what to do. I shut off the CO2, turned on both filters thinking they were gassing out and tried to get the surface to exchange some O2 ASAP.... but it was too late.
18 Neon Tetras
3 Harlequin Rasboras
2 Saimese Algae eaters
4 Otto cats
maybe 1-2 Amano Shrimp
I effing hate my life right now.... 6 months down the drain.
the only survivors (so far - it's been about 3 hours) are:
I see tons of amano shrimp still
4 Panda Corys
4 Starbae Corys
2 Albino Corys
Can someone give me some ideas as to what may have happened???
- Did I gas them out?
- Could it have been to much temp difference? ~ 5*F from Trash Can to tank
- Hardness too high?
- Toxins from new trash can/RODI system?
-> I did NOT thoroughly clean trash can before use, I just sprayed it down with my hose and dried it out before using
-> I DID run about 8 gallons through RODI system right into drain because I know it's new and may have some stuff - TDS meter (both my Pen and attached TDS meters) showed 0 ppm from RODI into trash can
- Trash can sat outside overnight with water in it and no water flow until this AM when I put sump pump and heater in it.
My girlfriend will be home in about 30 minutes - 1 hour.... I have no idea what to tell her... This tank has cost me quite a lot of money in the 6 months I've put it up.
48L x 18W x 23H - 80 Gal/300L
1x Cascade 1500 Filter
1x Eheim Pro 3 Filter
1x hydor 425 circulation pump
CO2 diffuser under intake for Cascade, and within inches of Hydor pump too
- run around 3-4 bps
160# Eco complete black substrate