Comment

Comment by Sheri Schmeckpeper on March 31, 2012 at 11:16pm

Michael, after looking at your picture again, you're right-the tail has major damage. Given the size, your fish are maturing and probably starting territorial/mating behaviors. The little ones take the brunt of it.

Comment by john tramell on March 30, 2012 at 5:04pm

christian if you google pool liner above ground  there are a couple that say they offer the liners that are aqua or fish safe they will even make them to fit whatever pool or frame you have  take a look also aquatic eco offers a liner that will fit a roll off dumpster like the ones used at construction sites.

 

Comment by Michael Welber on March 30, 2012 at 12:50pm

I added more aeration today so we'll see what happens. The tails on the dead fish have been bitten so I'm guessing that it's the big boys chasing the little ones. 

Comment by Christian De La Nuez on March 30, 2012 at 12:17pm

Jon, do you use the Ultra frames or the regular blue frames? Thanks

Comment by TCLynx on March 30, 2012 at 11:28am

tinted water is fine.  The earlier comments/questions about DO are of interest though.  Make sure you have plenty of aeration.  I've noticed fish not eating as much as I would expect when the dissolved oxygen levels got low though not dangerously so.  And if there are any spots where uneaten food or fish poop are building up in the fish tank, that can also be a cause for concern since a build up of such things in the fish tank can become anaerobic and when stirred give off toxic stuff for the fish.  It is also possible that such build up can deplete a tank of dissolved oxygen if the aeration isn't sufficient to keep up.

Comment by Michael Welber on March 30, 2012 at 11:21am

Thanks for pointing that out. As a newbie I have concerns about EVERYTHING. So this put this issue out of my "worry box." 

Comment by TCLynx on March 30, 2012 at 11:04am

Amber, Tea or brown colored water is common in aquaponics, the fish don't care.

If ammonia and nitrite are 0 or only a trace (below .25) then I wouldn't be worrying about doing water changes unless you suspect some contaminant in the water that would be improved by changing the water.

Comment by Jon Parr on March 30, 2012 at 10:01am

From the picture, with the red around the pectoral fins, I'd guess ammonia or low DO. I know you said ammonia was fine, still, that's my guess. Low DO usually affects larger fish first. Are there ever any fish gulping at the surface? A partial water change is never a bad thing, as long as your water is pure, and reasonably similar in pH and temp.

I testify positive to the use of Intex snapset wading pools. I use them for tilapia, redclaws, blackfish, perch, bluegill, green sunfish, crappie, minnows, Gambusia, pangasius catfish, snails, daphnia, and green water. No problems, even with brand new pools filled with well water and fish immediately. A brand new pool will grow algae in a week.

Comment by Michael Welber on March 30, 2012 at 9:27am

I didn't actually change the water. I added water. I get evaporation from the plants and from normal evaporation so I have to add some occasionally. Also I wanted to give the fish more room by keeping the water level higher. I have been keeping a log of everything so I will monitor all of these factors more carefully. Thanks for all your help. 

Comment by Sheri Schmeckpeper on March 30, 2012 at 9:19am

In a normal home aquarium 5 min is the rule of thumb, but tilapia aren't normal.:) I'm glad to hear TXLynx say that, because it supports how I've been feeding.

This is just a thought, but my concern is that they died so close in time to each other. If it were just food, it seems they'd be more random, and fish tend to pick on weak ones so it seems like there would be signs of bites & things.

You changed water yesterday but they died over a few days? Did any die before the change?

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