A tank in peril

Jessican

Active member
@Humblefish if peroxide only lasts a max of 8-10 hours, what are your thoughts on more frequent but smaller doses? Instead of me adding 15 mL every 12 hours, what if I did 10 mL every 8 hours?
 

Humblefish

Dr. Fish
@Humblefish if peroxide only lasts a max of 8-10 hours, what are your thoughts on more frequent but smaller doses? Instead of me adding 15 mL every 12 hours, what if I did 10 mL every 8 hours?
That would probably work fine, but there's no precedents for dosing more frequently than every 12 hours. It should be OK, however.
 

GoldeneyeRet

Active member
Did a big water change sucking out as much junk as possible. Installed my uv and a lot of carbon. Left lights on but lowered intensity and length. I'll leave it like this for a few days and see what happens.

Got all the.corals to my house. They all got dipped twice. Lots of nasties, I'm not sure any will survive.
 

DexterB

Well-known member
Praise for you helping out another hobbyist & their livestock. You are not only helping but mentoring another person to be able to take better care of their livestock. Hope all your hard work is rewarded. It is encouraging to see so many kind individuals in this hobby (especially on this HF forum).
 

GoldeneyeRet

Active member
Dinos have noticeably diminished today after 2 days of uv. The rocks are mostly clear but the sand remains brownish. I changed carbon, blew everything off with a powerhead and started a blackout to force remaining dinos into the water. My goal is to eliminate as much toxin as possible before starting h2o2 or CP.

Fish don't look any worse but the inverts, especially snails, seem stressed. I added an extra bag of carbon and changed the 2 bags I had in there. That makes about 7 cups in now. lol it's a lot but coolia are toxic and there are a lot of them in the tank.

The filter floss in the tank and the socks in the sump were coated solid with dino. Its amazing how much will clump to that stuff.

Honestly, I expect some losses tomorrow. Hoping for the best.
 
Last edited:

GoldeneyeRet

Active member
Blackout just finished today. Dinos look better, fish look worse and several snails died. I did a cleaning of all the pads/socks and a quick vacuum of the sand. The dead dinos are just gross. I added a ton of fresh carbon and let it run for a few hours.

First dose of h2o2 went In after removing carbon and UV. I shut down the flow pumps and left just the return running. Lights are at 10% blues and 1% whites. I may just keep them off...

The.corals at my house look tough. Dont know if any will survive.
 

Dierks

Active member
That is a mixed bag right there, glad the Dinos are starting to go away but its tough that none of the coral might make it. You are doing everything you can for these folks and I think you are doing a great job as it sounds like you started with a nightmare.

I hope the fish make it as its always tough to lose them. Keep up the good work, you are doing awesome!
 

scubabeth

Active member
You're doing so much to help this local reefer; I hope your efforts pay off and you're able to salvage a good bit of the tank occupants. Dinos are nasty things; the black out, manual removal, and UV will work to knock them back, but UV will have to be run for a long time to really kick them, most likely, and I know you can't run UV with the H2O2. Hopefully knocking them back for now will buy you some time to take care of the illness issues with fish, as a tank can keep going with dinos (even coolia or ostreopsis--I know you've ID'd coolia) for a long time with healthy inhabitants being maintained in the tank. We've been there, and beat them (knock on wood). While you're treating with H2O2, I suggest continuing to switch out the carbon regularly and doing one more thing: Dinos REALLY like to attach to filter pads, and will prevent as much attachment on sand, rock, etc. Cut pieces, maybe 6x6 each, to put on both sides of the tank near areas of high flow. Dinos will clog the filter pads daily (it's disgusting); rinse in freshwater to remove as many dinos as possible and reuse for a week or so until the pads begin to wear out, then cut new ones. This is really cheap to do, and might sound like it's too simple to do any good, but other than UV, it was one of the most helpful ideas suggested by someone on R2R. Don't underestimate it!

I don't have experience with the other aspects you're dealing with, but thankfully you've got the expert @Humblefish in your corner with advice!

We're rooting for you as you do a very good deed!! :)
 

GoldeneyeRet

Active member
To those that have used H202 in an established tank at a dose of 8-10 ml/gal, how long until you saw an improvement, or at least a stabilization, of affected fish? These fish have started to decline a bit. I suspect there is a lot of stress with the dinos being killed, stirred up water, changing tank conditions etc.
 

scubabeth

Active member
I read you had used filter pads, but wasn't sure if they were in the DT or sump. Good!! (y) Nasty, isn't it?! If you can continue to use them as you have to stop UV; it won't eradicate the dinos, but will keep them off more items in the tank/out of the DT water column as much while you treat with H2O2.

Hopefully @Jessican or @Humblefish can chime in on your H2O2 question. Fingers are crossed for the fish!!!
 

Jessican

Active member
To those that have used H202 in an established tank at a dose of 8-10 ml/gal, how long until you saw an improvement, or at least a stabilization, of affected fish? These fish have started to decline a bit. I suspect there is a lot of stress with the dinos being killed, stirred up water, changing tank conditions etc.
I saw basically an immediate improvement. I upped my dose today to every 8 hours instead of every 12 hours because I’m still seeing spots first thing in the morning, but I can tell the peroxide is helping within a couple hours of dosing it.

And edit to add: if you moved all of the corals, you might consider a higher dose. I’m sticking with 1mL per 8g because that’s supposed to be reef safe, but if it’s basically a FOWLR now, I think you can go as high as 1mL per 1g.
 

GoldeneyeRet

Active member
10 ml per gallon! wow. should I up the dose from 1ml/ 8-10 gal?

The tank currently has no corals, but there are motile inverts.
 

Humblefish

Dr. Fish
10 ml per gallon! wow. should I up the dose from 8-10 ml/10gal?

The tank currently has no corals, but there are motile inverts.
Unfortunately, inverts (especially snails & shrimp) seem most sensitive to H2O2. I probably wouldn't go any higher than 1ml per 5 gallons with them, and even that is a bit risky.
 

Jessican

Active member
I could move the inverts to the coral qt....
I’d move the inverts if you’re worried about them (or just plan to replace them). It’s a gamble whether I’ll be successful with peroxide at the reef safe dose. You’re much more likely to be successful if you can significantly increase the dose of peroxide. I’d add an ammonia badge, though, just to keep an eye on the biofilter with higher doses.
 
Top