Misleading Information Leading To Tank Change

SpookyTooth

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Hello.

My name is Rachel, I'm new to the forums and mainly joined with a dilemma I'm trying to tackle. I hope it is all right to ask a question so soon, but I've found myself in a bit of a pickle after having acquired some new information and am hoping for some advice, if I may?

I've kept coldwater fish for a few years, however my question is regarding a tropical species and also tropical tanks. I've read the forum rules and guidelines and hope that this is the right place to post my enquiry, and I apologize if it is not. I have also tried the search function, but I honestly don't know what to search in this instance, and ended up with 40 pages of posts. I also apologize for the long topic title and the length of this post.


Roughly a week and a half ago, I decided to purchase a new tank for my coldwater fish. I only had two at the time but their old tank was second hand and the glass was slightly tinted so it was very dark inside. Alongside the new tank, I thought I would add some new fish to my community as this tank was rather large.

Now, the pet store I went to is where I have purchased several fish over the passed couple of years, and they have all been in great health and have lived long, happy lives. I've also gotten a lot of great advice from them. I saw they had new stock in their coldwater section, and fell in love with the vibrant colours. After asking how they would react with a different species of fish, I was informed they were docile and a wonderful addition to a fish community. I double checked that they were in fact coldwater fish with the assistant, and she said yes.

Yesterday, I went to a different gardening/aquatics centre. I wanted to get some fluorescent lighting and plants, but thought I'd have a look at their fish while I was there. The tanks weren't labeled as coldwater or tropical so I asked an on-hand assistant who informed me the only coldwater fish were your typical Shubumpkins (which I have kept many of over the years), American Flag Fish (I've also kept a pair of these) and your classic Goldfish. She also said that Danios weren't bad in a coldwater tank, as long as you kept an eye on the temperature during colder months.

The fish I had purchased from the previous store a week earlier were Platys. I was confused, as this store also had Platys. I told the assistant what had happened at the other store, and she was very surprised. She said that Platys were tropical fish, and should not be put in a coldwater aquarium, although they are hardy it's just not wise. This grieved me a little as the pet store where I purchased the Platys said they were coldwater, it was labeled coldwater and they told me they would thrive in a coldwater aquarium. I've done more research online and it has confirmed what the kind lady had said. Now I have a dilemma.

The Platys have been thriving in my new tank and have in fact been showing signs that they are breeding. It is summer in the UK, and I think the warmer weather may have warmed the water in my tank up to a degree suitable for all the fish to live in harmony, but I'm very worried as Autumn is fast approaching and when Winter gets here I don't know what'll happen to the Platys.

I'd like to purchase a heater and slowly "change" my tank from coldwater to tropical, but I don't know how my other fish would handle it, and I have no idea how I would go about this. My original fish are a type of guppy (he is the offspring of a "coldwater guppy" purchased from the pet store where I got my Platys. He does not have the fanned tail and vibrant colours of your tropical guppies, so I haven't questioned it. He's a bit of an unknown species though) and a molly -- which to my dismay I have been informed is ALSO tropical, though I've had her in this tank for over six months and she is absolutely thriving.

I have to admit I feel very guilty. I want to give my fish the best care I possibly can, and I feel I've done everything wrong. Fish are a huge part of my life at the moment, as they offer relaxation and I simply love watching them grow and change through their lives.

I'm mainly wondering if anyone has any advice on how I could possibly "change" my coldwater tank (if I can) to a tropical one, or just increase the water temp, so the Platys and the Molly live their lives happily. Sure, the Molly seemed okay. She's been swimming around happily, eating plenty and has grown quite a lot since I purchased her, but I can't stop this wrenching feeling that I've been doing her more harm than good. I'm trying to identify this "coldwater" guppy of mine, but without being able to take a photo there's little I can do. I'd like to offer a description, but my post is getting rather long and I don't want to bombard everyone with too much at once. If anyone would like a description, please let me know and I'll post one below this topic. I'll also try to find a photograph online that is similar to my little unknown quantity.

Thank you so much for your time.
 
hi and welcome to the forum :good:

are these fish, in with your goldfish?

what size tank do you have? is it filtered?
 
Thank you for the welcome! Goodness, I'm ever so sorry I have forgotten the most important dimensions of my tank lol!

The tank I have is 18" x 12" x 12" which is 45.7cm X 30.5cm X 30.5cm
It's a 29 litre tank, which is 6.3 gallons.
It has a filter which also emits bubbles.

The Platys are in with a Molly and an unknown species of guppy, which I was told was coldwater.
 
platys need 20 - 25c temp (some people say a min. of 17c), guppies 23-24c but can go up to 29c (apparently), mollys need 24-26c.

So looking at that, you would need an average tank temp of 25c.

You will need a 50w heater, something like the one on this ebay link
.
 
As an eBay Associate we earn from qualifying purchases.
Hello Rachel,

very detailed post, welcome!

I'm unaware of any cold water guppies, but there are some expets here who could tell us otherwise (OldMan47....if you are reading???). If you only have guppies, mollies and platies in the tank then I would certainly look to buy that heater and gradually raise the tank temp to 'tropical' levels (24c-27c roughly).

However, lets see if someone can confirm if the cold water guppy is actually waht it is. Would be great if you had a pic that would help people identify it.
 
The tank I have is 18" x 12" x 12" which is 45.7cm X 30.5cm X 30.5cm
It's a 29 litre tank, which is 6.3 gallons.
It has a filter which also emits bubbles.

I'm afraid you have other concerns than just the heating. The size of your tank is not considered large enough for mollies. Mollies can grow to 6" so to keep them in a tank that is only 2 or 3 times their length is far from ideal. Yes, they may seem to 'thrive' but just because they are eating and moving does not mean that they are perfectly happy.

Is there a chance that you could return this fish to the store or perhaps give him to a friend that has a more suitable tank?
 
Welcome to the forum SpookyTooth.
All of your new fish are tropicals in the sense that they cannot go down to near freezing the way a goldfish can. I also keep guppies, mollies and platies and have found that they do fine down to around 20C. If your home is at least that warm year around, they can be kept quite nicely in the unheated water of a home aquarium. A small tank like yours can easily be heated with any submersible heater but it should not be necessary.
 
UK weather is terrible, never a stable temp :lol: esp now the hot weather is fading :sad:
 
A small tank like yours can easily be heated with any submersible heater but it should not be necessary.

OldMan47, can you comment on the size of the tank being adequate for mollies? I'm only regurgitating what I have read whereas you will have 1st hand experience.
 
depends what molly i supose, sailfin and they need a good 20 gallons, not sure on the others.

If you don't know the breed of molly, can you take a pic please?

Guppies and Mollys can cross breed, so maybe there is a possibility of your unknown guppy being a crossover? A pic would be fab though :good:
 
I have kept a small number of mollies in a tank about that size with no trouble. It is a very small tank for things like goldfish, but is fine for one or two mollies and a few platies and guppies. Stocking levels need to be very restricted because it is such a small tank but a molly should be able to live out its short, 3 or 4 years, life in a tank that small.
 
I'd like to thank everyone for the information. You've been most helpful. I had no idea the heater would be such a low price, I was expecting to pay upwards of £25 for one! As for the tank size, it was the best I could afford, and I only have one molly -- though I'm always careful as to how many fish I put in a tank. Your advice is noted! I'd like to add that we purchased the molly after my mysterious little fellow was born, but his mother could have crossbred.

I've gotten various photographs, although their quality leaves a lot to be desired. I'm useless with a camera. I've included links. I've had to increase the amount of light and colour definition so you can see him. I've also included a photograph of something that looks very similar to him.

To identify him in the photos: He's 3 cm long (I know that exactly, he's very friendly and swam up to the ruler LOL). He is a bright yellow, almost golden. He shines green in the light, his fins and tail are orange. His tail looks bedraggled, but I assure you he's in good health.

http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Pickle5.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Pickle4.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Pickle3.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Pickle2.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Pickle1.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/SimilarToPickle.jpg

Also, I'm sorry for the late response. I literally just took these photographs and had to upload and resize them.

Edit: I've just reread a few of the responses. I had no idea mollies grew so large, the store knew our tank size and we told them of the fish when we purchased the new one. It's such a shame to have to rid of her, but if I have to I'll ask my neighbors. I only have two pics of her, but I'll upload them for you anyway. I'll get more soon as I can.

http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Molly1.jpg
http://i73.photobucket.com/albums/i235/x_grey_wings_x/Feesh/Molly2.jpg
 
It's only sailfins you have to be aware of when it comes to size. They're the largest variety.

Normal mollys and ballon mollys are ok in smaller tanks.

As for the fish pictured... they're a bit odd looking. I'm not professing to be any livebearer expert but they just don't like right...
Your molly imparticular...

Also if you could get anymore side on pictures they would be more useful :)

As for the heater issue, I think it's been 'resolved' but basically as oldman said unless your house is consistently above 21C and your tank is also staying at that temp I would get a heater. They don't need 25C... but over 20C is definitely preferable. :)
 
tbh i don't think you'll have to rehome the molly you have, I doubt she will get any bigger than 3", just don't add any more mollies :good:

ebay is every fishkeepers friend :lol:
 
Well thank you both. It's a relief to hear I don't have to get rid of her, and I'll pick up a heater asap.

They look funny? Could it be the quality of the image? To be honest... after what's happened at the petstore I bought them from I wouldn't be suprised if they weren't even fish but gnomes in disguise. I'm rather distressed, I have to say. Maybe I should stick to american flag fish... they seemed to do really well.

It's difficult getting photographs, particually due to a problem I have with standing still for short periods of time, it affects my hips. I will try to get more side-on pictures though eventually. I think I might go to that store and have a chat with them.

Maybe they just don't have the best stockists. I'd wondered if my little unknown had been the product of two related fish and so became deformed, his mother was 4x his size.
 

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