Swollen or Pregnant female guppy?

hello guys,

I’ve currently got a 180l (40g I believe) tank, with dwarf hair grass, other live plants, and some hiding places etc.

I’ve got 4 male guppy’s and 12 female guppy’s with 4 shrimp.

I’ve noticed a female (I believe) guppy has a swollen belly, eats fine swims fine etc but sometimes does stay at the top of the tank on its own, I will attach pictures.

Is she pregnant or do I have anything to worry about? I also have another female, that has a slight swollen belly to the rest of the females, same situation with that fish, do you think pregnant or anything else to worry about?

Thanks guys.

The orange and yellow female looks like she has a bit of excess mucous and slightly clamped fins, which could be poor water quality or a minor protozoan infection. The other females look alright.

The male in the following picture (see link below) appears to be deformed or really malnourished. He could have worms and gill flukes and should be treated for that.
http://www.fishforums.net/attachments/da61a9ec-7c0b-45a4-8eb7-39ec1738a221-jpeg.91134/

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Livebearers (mollies, guppies, platies, swordtails) are regularly infected with worms and gill flukes.

Use Praziquantel to treat them for gill flukes & tapeworms, and Levamisole to treat them for thread/ round worms.

Remove carbon from filter before treatment otherwise it will adsorb the medication and stop it working.

You treat them once a week for 3-4 weeks and do a 75% water change 24-48 hours after treating.

Don't use the medications together because you can overdose the fish and kill them.

The easiest way to treat them is to use Praziquantel on day one. Do a 75% water change and gravel clean the substrate on day 2 & 3. Treat the tank with Levamisole on day 4 and do a 75% water change and gravel clean on day 5, 6 & 7 and then start with Praziquantel again on day 8.

The water changes will remove most of the medication so you don't overdose the fish. The gravel cleaning will suck out any worms and eggs that have been expelled by the fish.

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To work out the volume of water in the tank:
measure length x width x height in cm.
divide by 1000.
= volume in litres.

When you measure the height, measure from the top of the substrate to the top of the water level.

There is a calculator/ converter in the "How To Tips" at the top of this page that will let you convert litres to gallons if you need it.

Clean the filter after the first treatment. However, if the filter is less than 6 weeks old, do not clean it.

Increase surface turbulence/ aeration when using medications because they reduce the dissolved oxygen in the water.