I'm guessing that AquaTech a line of filters made by Marineland for WalMart and marketed under the brand of Regent. If you Google the AquaTech model and Marineland, you can probably find the equivalent models. I like the idea that AquaTech's numbers match up roughly with the size tank it should work with. That at least is what can be assumed from nosing around on-line. I wish we had seen your post before we stopped by Sam's Club the other morning - could have gone next door and checked WalMart's pet section.

If it also has a biowheel, something that Marineland (originally Penguin - now a part of Marineland) developed, so much the better. That makes the whole filtration system more effective. That filter, coupled with a wise population concentration, an "imported nitrogen cycle" and careful feeding, your guppies should thrive.

There is a tendency for very small fry (maybe the naive and newborn, dumb and the deformed) to get sucked up into power filters.  Having said that, if you had a bunch of plants in your 10, the fry would shelter there and most of them would survive both the parents and the filter. A couple of Guppyloggers have reported that in a "roomy" filter box (and probably a filter whose current is not too strong) they have rescued fry. After a couple of days, fry are much less vulnerable to getting sucked up by a HOB (hang on the back) filter.

You mention bubbles in that 1-gallon tank or bowl. That suggests an airstone. Keep it going. Also, get a clean, soap-less gallon water jug, fill it with Luke-warm tap water, treat it with whatever water treatment your LFS (Live Fish Store) has suggested for your water supply, and leave it open for a day or two next to the bowl. The next day or two, siphon 1/2 of the water out. Replace it with water from your treating/seasoning jug. The next day change 50% again and then refill & treat the jug. In the summer, we can usually get away with just leaving seasoning jugs (or in some cases 55-gallon drums or in one guy's case 300-gallon stock watering tanks) near the aquariums. (In winter, heat is an issue.) You might get away with no air on that tiny container, but a little air is useful.

If you move the fry into a five or ten-gallon tank and can run a filter off of that air pump (sometimes a 2-way valve and extra airline will do the trick)  an inexpensive box filter (take the top off & put filter floss in) or a sponge filter will serve the fry well. Even guppy breeders raising guppies for show will often just use one of those basic filters and do the frequent water changes. On a larger tank, if you are not over-feeding, you can probably back off to a partial water change of 40-50% using treated, "seasoned" water once a week.

This is more for the benefit of those looking on, I'm pretty sure you know this: It is best not to keep guppies with goldfish because their needs are so different. In time, that goldfish, which can live 20-30 years, will need a lot more space than a five-gallon tank. Some goldfish people would suggest that 3 or 4 adult goldfish would do well in a 55-gallon aquarium. (In Germany it is now illegal to keep goldfish in bowls, on the premise that it is cruelty to animals - sort of like keeping a German shepard in a closet.)

The filter in a sense is just a part of the larger biofilter (= the entire aquarium). We can hurry the process along by starting a new tank with gravel, plants, maybe a filter previously started and even 50% of the water from an established tank. Really the whole aquarium is the "biofilter" or biological system. The Simple Guide to Fresh Water Aquariums (Simple Guide to...) by David E. Boruchowitz (Paperback - May 2001) explains this well. (Drop by a big-box bookstore, pull that work off of the shelf and read it in the coffee shop. Buying it is your option.)

If another home could be found for the goldfish, the five-gallon tank would work for a while with the fry. I'd take the power filter with the goldfish to a larger tank and use a safer air powered filter with the fry.

You are wise in not putting them in a breeder tank. As you suggest, that is even more confining. Sometimes people have "gotten away" with even having a female drop fry and live through the experience, but most hobbyists would recommend NOT ever using those "little boxes of death."

Please click on Immediate Help in the upper left of this page and, when time permits, take a look at Breeding, Pregnancy and Birth and Fry Diet and Safety.

In a sense raising guppies or any other fish we play something of an odds game. Fry and adult guppies will be more healthy, grow faster, show more vibrant colors, sport better finage and even drop more (and slightly larger) fry the larger their aquarium is, the more partial water changes they have, the less crowded the population is, the more effective the nitrogen cycle is (0 ammonia, nearly 0 nitrite and under 20 PPM nitrate) and the more varied their diet is. "Structure" in the form of plants (plastic or live), rock-work and other hiding places is optional, but often beneficial. The same discussion accompanies gravel. One would be wise to get a gravel vacuum and "vac" half of the gravel each week.

If we can afford the tank space to quarantine new fish for a couple of weeks and also to administer a broad spectrum anti-parasite treatment to them, you can avoid the vast number of diseases which might afflict your fish. (And conversely if you introduce new fish directly into your community tank, I guarantee you will have losses, perhaps of all the fish.) I'm sure that there are other factors not mentioned influencing the health of our fish.

I hope there is something of use here. Please feel free to disagree or ask for clarifications.