transitioning canal-caught minnows to new aquarium set-up?

highpowermom

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Jun 5, 2015
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First off, I'm glad to have found this forum. I've been searching and reading articles for days, but most of the fish forums I came across were inactive.

Second, background: We live on a canal on a large chain of lakes in Orlando, Florida, where last month my son and his dad caught nine minnows. I was on my way out of town and assumed they were going to throw the minnows back. Imagine my surprise when I returned a week later and found them (the minnows, not the boys) living in the same buckets of water!

I know nothing about fish, but since my son declared them "keepers" I immediately grabbed a Critter Keeper (I have a seven-year old boy, we keep these on hand as a matter of course!) and fetched a change of water from the canal. The next day we took the minnows to a pet store and asked loads of questions about how to keep them… which over the next three weeks led to more pet store visits and more questions with inconsistent answers… which is why I'm posting here.

Right now we have seven minnows (two died suddenly after a partial water change) living in a 1.75 gallon Critter Keeper (so about 1.5 actual gallons of water), with no filter or other equipment. Every couple of days we fetch a bucket of water from the canal, let it come to indoor room temp, and do a partial water change. We were doing a complete change once a week, but it's been about ten days since the last (jumping on that tomorrow). The "tank" is furnished with pebbles and river stones from dad's tool shed, a large snail shell recovered from the canal bed and a few live plants also pulled from the canal. Oh, and one store-bought decoration the fish can hide in. Tonight we discovered a snail, which after some reading I'm guessing came in on one of the plants or with a water change. After visiting a bona fide LFS (Fishy Business in Longwood, FL) today, we think one of the minnows is pregnant (is that the right term for fish?) and separated her into a smaller Critter Keeper.

So now I come to the questions. Since keeping these minnows is turning into a long-term project, I've been asking the pet stores/LFS how best to keep them, and the consensus seems to be to transition them to conditioned water. After sifting through the different answers, I've come up with a tentative plan: Set up a 5 or 10 gallon tank with water from the canal and run a filter on it for a few days. Since this is the water the minnows are currently living in, go ahead and put them in the new tank. Then slowly begin introducing conditioned water with water changes, maybe 10% at a time, once a week?

Is this a viable plan? Will the tank have the appropriate bacteria, etc. if I do it this way? Is there a better way? Once the tank is completely on conditioned water, would I be able to add fish purchased from a store? Or would it be advisable to keep the native fish separate? Is this whole project inadvisable, i.e., if we are really interested in fishkeeping as a hobby should we release the minnows back into the canal and start over?

Every day I read up I discover things to consider that I never knew needed to be considered! I appreciate any help you can give. Thank you!

Audrey
 
I think the important thing to do is identify what species of fish you are working with. Minnows can mean a lot of different species with different care requirements (particularly in Florida).

If you setup a 5-10 gallon aquarium with a filter you can transfer the fish into that tank with water from your canal right away. Changing 25% of the water weekly with tap water (that has been aged or conditioned to remove chlorine) will help keep the water clear in the aquarium and is easier to maintain.

From your description of one of the minnows being "pregnant" it is very likely that you have one of the many species of livebearers found in Florida (Gambusia, Poecilia, etc...). This would also explain how they were able to survive so long in buckets. Cyprinids (or the "true minnows") would not last very long without clean water and aeration.

What have you been feeding the fish? Livebearers will take to flake foods quite easily but cyprinids will take longer to adapt. If they are not eating try frozen daphnia or bloodworms to get them started.

If you post a picture of the fish (profile shot), we can probably identify them for you.

Andy
 
Andy, thank you so much! I've been unable to identify our minnows either by web search or taking them to local fish stores. These little guys are fast and hard to get a clear shot of! I'm attaching two each of the minnows, the one we think is pregnant, and the snail in case someone can help identify it.

Can you make recommendations as to the type/size of tank, filter, and water conditioner? Once we're transitioned to all conditioned tap water, would we be able to add store bought fish or should we keep them separate? That may determine the size of the tank. I'm thinking small fish like neon tetras and an otocinclus cat. I'm dangerously close to getting hooked on a new hobby… I don't want to go all gung ho just yet, but I don't want to purchase equipment that may be useless later if I decide to upgrade or add a second tank.

Thanks!
Audrey

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Clearly I don't know how to post photos in this forum, lol. There are five above. The first and third are the "pregnant" one, the second photo is the best profile I could get, and the fourth and fifth photos are of the snail. Thanks again! Audrey
 
The minnows are Gambusia. Which is a small livebearer found throughout the U.S. There are many species of Gambusia and it will be hard to identify specifically which one it is. You are correct that one is pregnant and will give birth to live babies.

A 5 gallon aquarium is fine for these fish and they are very hardy and take to flake food easily. They are also called Mosquitofish as people add them to ponds to eat mosquito larvae.

The snail is a bladder snail and will eat algae in the aquarium. They do reproduce so you will want to cull them if there get to be too many.

I would not recommend adding any other fish with them. They prefer water conditions slightly cooler than tropical fish and may be harboring diseases that could affect the tropical fish. They are also aggressive towards other small fish. Some species are illegal in states they are not native to for this reason.

Andy
 
Andy, thanks again! I'm impressed you even identified the snail with my lousy photos! I have the pregnant minnow isolated in a separate tank but I have no idea how long until she gives birth. Is it terribly stressful for her to be alone in the meantime? The LFS advised me to put her back in the main tank (sans fry) within 24 hours of giving birth, is that correct? I can't really fit a breeding net into the Critter Keeper and it even seems big for a 5 gallon (which I plan to set up over the next 2-3 days).

I forgot to mention that the minnows have been eating flake food. It only took a day or two and now when they see my son coming they get excited.

I appreciate the advice about not adding other fish with them and I'm glad I asked, that decides a few things for us. Right now the minnows live in my son's room, which has the most consistent temperature/least fluctuations in the house (we keep the thermostat around 75 degrees). Will they be okay in the winter, when we keep the house around 68, or will I need a heater then?

Tonight we picked up an Aqua-Tech 4 gallon aquarium kit at Wal-Mart. Will one less gallon make a huge difference? The price was right at ~$24 but I've read warnings against all-in-one kits and want to make sure I'm not asking for trouble. I only found one review on the kit, which was mediocre (http://www.walmart.com/ip/Aqua-Tech-4-Gallon-Home-Aquarium-Kit-Fish-Aquatic-Pets/36128986); but the reviews I found here on Aqua-Tech filters in general seem to be okay. I'm attaching photos of the box, if you wouldn't mind taking a look and advising me? I don't want to invest a lot at this point but I would rather spend a few more dollars if necessary to set us up for success. The side of the box not pictured has a shopping list of suggested-but-not-included items, such as an air pump (do I need this?).

I really appreciate how quickly you've been responding. Though they've made it a whole month through my ignorance, I'm worried about the little guys (and gal) and want to get them into a healthier situation asap!

Thanks,
Audrey
p.s. Love your screen name!
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I think that tank and set-up would be great for those fish. If you want the babies to survive, I would put a sponge filter over the intake so the babies would not get "sucked" into the filter. Also because it is a new tank it is going to go through a Bio Cycle, so be sure to keep up with the water changes.
 
I think that tank and set-up would be great for those fish. If you want the babies to survive, I would put a sponge filter over the intake so the babies would not get "sucked" into the filter. Also because it is a new tank it is going to go through a Bio Cycle, so be sure to keep up with the water changes.
Thanks. After all that, the tank in the kit was cracked. Tried two different Wal-Marts, no replacement. Researching options! :)
 
Petco?? Craigslist?
 
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