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Something bizarre is happening to my guppies.
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Hoshinai
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Joined: 14 Jan 2007

PostPosted: 2007.01.14(Sun)3:24    Post subject: Something bizarre is happening to my guppies. Reply with quote

OK, I have 5 fairly young(1 inch or less), seemingly all female guppies(grey and very non-fancy) in a fairly new 20 gallon tank. They were first given to me by a friend whose guppies had babies. I was unprepared for them, and they spent the first week in a Tupperware bowl, later moved to an old 2 gallon hexagon tank. After another week of that, they were finally in a well-planted 20 gallon.

They have lived through high ammonia, nitrates, and nitrites, but are now much more stable, save for a high pH of 8.0.

I have an AquaClear 3 Stage Power Filter for 30g, and various plants. I do weekly 4g waterchanges.

The problem is that all 5 have(and have had to varying degrees since being in the 2 gallon tank) strange black spots and stripes on their tails. It doesn't seem to bother them, and the tails aren't rotting, but I can't tell if the marks are a natural pattern or something else.

On the biggest guppie, it looks somewhat patterned, but the other just have random black stripes on their tails. Unfortunately I don't have a picture.

This is my first aquarium, now that I'm getting into the hobby I just wanted to see what people thought, because when the tank is 100% cycled, I wanted to add a few more fish.
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Majie
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Joined: 25 Jul 2006
Location: Nottingham, UK

PostPosted: 2007.01.14(Sun)6:16    Post subject: Reply with quote

I'm no expert, but I do have a lot of baby guppies. I suspect that this is just the development of natural patterning - most obviously in the males. Some of my male guppies develop their natural colouration quite early, others take a while and are quite large before they blossom.

Do your friend's adult guppies have much patterning?
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Hoshinai
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Joined: 14 Jan 2007

PostPosted: 2007.01.14(Sun)15:27    Post subject: Reply with quote

I'll ask about her guppies.

I'm just concerned because the black spots/stripes are somewhat erratic and not exactly in a pattern. The fish themselves are a silver/grey, so seeing black on their tails is a bit alarming.
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Majie
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Joined: 25 Jul 2006
Location: Nottingham, UK

PostPosted: 2007.01.15(Mon)4:32    Post subject: Reply with quote

I know what you mean - but my male guppies certainly develop their tail colour over several months. It might start off with a few black streaks and marks - then get some yellow or blue colour - and at the moment I have some whose tails eventually go red (after being yellow for weeks).

As long as they seem happy and healthy - I wouldn't worry.

I'm afraid, even when the colour is fully developed, you won't get nice symmetrical patterns on all their tails (unless, of course, your friend is a professional breeder - but even then the patterns will vary). Most guppies are a complete mixture of all sorts - and the babies will reflect this. It's half the fun of breeding them (if you're an amateur) - seeing what colours you get. (I never had a red tailed adult male guppy to start with - it must have come from one of the girlies Laughing )
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