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Discussion Starter · #1 ·
after a long period of time with fish dying we finally have the tank stabalized. its been almost a year now and no fatalities. i have 3 danios, 2 cherry barbs, 1 checkered bard, 1 bushy nosed pleco and 1 horse face loach.

just today though i noticed one of the danios has a red spot slightly behind his one side fin (its not a red gill). it looks like the scales have been rubbed off. i feed them a variaty of foods. pelets, algea/sinking waffers, freeze dried tubifex worms and for the last 2 months i fed them live blood worms. the bloodworms were for my beta which suddenly refused to eat anything but live worms but since there were so many the guy at the pet store suggested to also feed the main tank, which i have. i checked the PH and it was slightly high but all the other fish look fine. i added some PH up and a little aquarium salt.

anyone have any advice? to my knoledge the fish have never been aggressive with eatch other so i'm doubtful its a attack wound.
 

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Um you tested the pH as being high and you added ph UP? Use caution with those pH adjusters because once they overcome the buffering capacity of your water the pH with change drastically in a short period of time. You may want to observe the fish and make sure its not some sort of injury caused by another fish picking on him.
 

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Welcome.:wave:

What are your water parameters? Ammonia, nitrites and nitrates. I would stop the use of pH chemicals such as pH up. They do nothing but harm your fish. Once the effects worn off, the pH will shift back to its usual level. Such shifts can greatly harm your fish.

What live worms were you using?
 

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Discussion Starter · #4 ·
i ment it was low and added PH up

its just we had ALOT of low PH problems in the past and things like that were the only things that helped.

i don't have any nitrogen strips to test but PH was about 6.2, ammonia is high right now about 6.0. but i had just tested it prior, about 2 weeks ago and it was almost zero.

i'm thinking of doing a water change tommarow.

the live worms are blood worms
 

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Use crushed oyster shells to increase the pH.
 

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wow thats a high ammonia reading. suprised anything is holding on in there. the tank definitely isn't stable if the ammonia is spiking like that. did you change out the filter media recently or anything like that? that or you're overfeeding by quite a bit. decaying food will spike the ammonia too.
 

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Discussion Starter · #7 ·
well i just did a small water change at the moment to help with the ammonia. i'm not feeding them any more then i usually do. the last filter i changed was about 2 weeks ago. it was a mechanical filter. acually i've had the ammonia up alot higher in the past but that was with cycling. it hasn't spiked like this for months.

how often should you feed a 20 gal tank with 10 fish(forgot my 2 corys)? i usually give them about 10 pellets a day along with 1/2 alge wafer or 1/2 tubifex cube. its always gone by morning. usuallyi'll skip a day here and there as well.

crushed oyster shells increase PH? any particular brand or anything like that? how much would one put in a 20 gal? and is there anything you should use to stabalize PH when you get it to the right level?

thanks for the replys btw. i appricate the input
 

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never, i repeat, never add chemicals to raise or lower ph, it is dangerous, costs quite a lot, and is even worse than having a bad ph in the first place.

The reason of this is because the chemical only lasts for a very short time. An example is

Current ph 6.5
Wanted ph 7.5
You add ph plus
your ph is now 7.5
Two days later it is back to 6.5
your fish are now dead.

It is a high swing of ph, from 6.5 to 7.5 immediatly, and from 7.5 to 6.5 immediatly, within 48 hours. Fish can adapt to a wide varriety of ph so let them adapt to it.
 

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well I wouldn't say never but generally speaking its a very bad idea for the reasons musho stated. the only exception to that in my opinion would be their use in an extreme emergency (severe pH crash, etc) were the current readings are well beyond the limits of you fish to survive in which case the massive pH swing would be better than letting the fish continue under the current pH. It might kill the fish anyway but gives them a better chance at survival.
 

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Discussion Starter · #11 ·
alright. i did a big water change and i'm going to hold off feedings for a day followed by reduceing what i did feed them. Also going to keep what everyone suggested about chemical PH adjusting in mind. should fish be fed daily or is every other day ok?

they all seem fine at the moment except for the one with the red spot. it looks more like a wound then a sore caused by something. it is quite red though. the fish is acting normal and is very energetic. should i try to do anything for him?

this is my first fish tank so its all new to me. like i said i've had it over a year and after a real rough start its been doing fine for the past 6 months or so till now
 

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I feed mine every day (or in the case of the baby angels I'm growing out several times a day...along with large water changes every day) but there seems to be a common consensus that most fish will be fine if fed every other day. I feed mine all the time due to the fact that a large majority of my fish are being prepared for future breeding and are being conditioned accordingly. I've never had fish suddenly go belly up though because they missed a feeding though. I'd suggest cutting down to every other day and just observing them to see if they show any signs of malnutrition and adjust the feeding accordingly. You may want to add some type of medication to prevent secondary infections but i'd reccomend using a hospital tank for that to avoid causing problems for the other fish by giving them unnecessary medication. Perhaps someone else can suggest a medication for you. I use malachite green for this kind of work but it can be a pretty dangerous medicine if you use too much accidentaly..it can also stain things like the silicon seals on the tank blue or green...and the stains are practically impossible to remove.
 

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Maybe it is from fin-nipping. If one of your fish has an open sore you can add some Melafix to your tank. If your water perameters are safe, you have added some salt and your tank is clean your fish should heal.
 

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Discussion Starter · #15 ·
got a slightly better picture


hes in a hospital tank now but hes not eating. the wound doesn't look much worse though

hes not eating but that may just be cause the stress. hes pretty much sitting in one space almost at the bottom. every once in awhile it looks like he gets a burst of energy and darts around.
 

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hmm im not sure but he might have gotten a burn from the heater, add some melafix to the tank and it should start to heal and it will also prevent infections, also if you have a small separate container you can give it salt dips, but ask someone else on these salt dips since im no expert. May i also ask what your ph is, danios can accept almost any range of ph (5.0-8.0)
 

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Discussion Starter · #17 ·
PH at the moment is about 6.3. which is low for my tank. then again this week the whole tank went out of wack. though the heater burn theroy is intresting cause it got extra cold here recently and the tank temp dropped almost 2 degrees. dureing that time they were all hanging out on the right side where the heater is.
 

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Discussion Starter · #19 ·
yes. we treat it though with a water conditioner before putting it in the tank. we did test the tap water for PH problems at one point. don't remember the exact # but we determined the tap water itself wasn't causeing any crazy PH shifts
 

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ok, can you give me a run down on your tank, what gravel, what plants, what filter, what things do you add to your tank.

About the ammonia, i think you are feeding way to much food. Look at one of your fishes eye, that is around how big there stomach is. Overfeeding is very bad for your fish and tank. Take this in consideration, fish can starve for 2 weeks and not really care, some fish can eat 1 hour non stop and die.
 
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