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Mysterious fish disease?

So I have a 30 gallon freshwater aquarium. And all has been well for the past 6 months with it. But recently my fish have started dieing. First it was my 3 red swordtails. They were fine when I checked on them at night before I went to bed, but the next morning one would be dead at the bottom of the tank. This went on until they all died. Now my 2 marbled angelfish don’t look so good, almost like they have trouble swimming. They are also sucking air at the top of the tank. My 3 cory cats are doing fine. Does anyone know what this could be and how to solve it? I do a 10 percent water change every 3 days and I have a power filter for a 40 gallon tank as well as a sponge filter for a 40 gallon tank. I also recently replaced the media for the power filter, about 2 weeks earlier then I normally would have to see if this would correct the problem, but it didn’t.
Just did a 30% water change the one angelfish perked up, but the other is still same. The water temperature is steady at 78 degrees fahrenheit.

Tropical aquarium….Any advice?

We have a tank (95 litres) and we have just set it up and put sand in,with a rock and decorational plants,put in filter and heater. This all came with the tank(and stand) exept the sand.The sand is aquarium sand so it should be fine. We are letting the water cycle for about a week but this weekend(maybe earlier we have to take the water out to level it off better. We will then gradually add fish after 5-7 days. We will probably end up having about 10 in there including a few guppys. ANy more tips or advice in geeral as i really don’t want to mess this up.
we added some fresh start stuff. which takes out the chlorine and chloranime. I don’t know if that makes any difference.

Exotic Environments Pirates Cannon Bubbler Aquarium Ornament, 5-Inch by 4-Inch by 3-1/2-Inch

  • Safe for Freshwater and Marine Aquariums
  • Authentically Detailed
  • Solid one piece construction
  • Swim thru holes for fish

Product Description
Exotic Environments Pirate’s Cannon Bubbler Ornament is made with durable poly resin material safe for use in all aquariums. Hand painted detail, 5-Inch by 4-Inch by 3-1/2-Inch tall… More >>

Exotic Environments Pirates Cannon Bubbler Aquarium Ornament, 5-Inch by 4-Inch by 3-1/2-Inch

Is this a good Aquarium set-up?

What kind of fish is the large light blue one?
Sorry I forgot to link to pictures.

http://img153.imageshack.us/img153/7626/dsc00522mg3.jpg

http://img229.imageshack.us/img229/8409/dsc00518hc5.jpg

and it is a 10 gallon

Two fish questions, please help?

Well my first question is are these fish compatible in a 30 gallon tank?
10 neon tetras
6 glowlight tetras
2 dwarf gouramis
1 male betta
3 otos

Quick question, have you had any luck with angelfish and cardinal tetras. I see it all the time at petstores and the angels are 5 inches long!

My second question is what is your favorite groundcover aquarium plant. I was thinking micro sword. Any suggestions?

Do Whisper aquarium pump filters fit Top Fin pumps?

since Top Fin is an exclusive PetSmart brand i’m looking for an alternative (and hopefully cheaper) brand of filter. the filters i use are Top Fin large 20-60 gallon. i checked out the Whisper large filters at Walmart and they appear to be the same size as the Top Fins.

making aquarium decorations?

I have made decorations of rock and pvc pipe using safe silicone. after a period of time it turns loose. and the decorations fall apart. I am in the process of setting up a new 55 gal chiclid tank and was wondering
about using some of the following,,,pvc glue, 2 part epoxy or fiberglass to make my decorations. letting them cure for a couple of weeks of course. does anyone have any experience with these products.
thanks

a few questions for the atheists?

1. Where did the space for the universe come from?

2. Where did matter come from?

3. Where did the laws of the universe come from (gravity, inertia, etc.)?

4. How did matter get so perfectly organized?

5. Where did the energy come from to do all the organizing?

6. When, where, why, and how did life come from dead matter?

7. When, where, why, and how did life learn to reproduce itself?

8. With what did the first cell capable of sexual reproduction reproduce?

9. Why would any plant or animal want to reproduce more of its kind since this would only make more mouths to feed and decrease the chances of survival? (Does the individual have a drive to survive, or the species? How do you explain this?)

10. How can mutations (recombining of the genetic code) create any new, improved varieties? (Recombining English letters will never produce Chinese books.)

11. Is it possible that similarities in design between different animals prove a common Creator instead of a common ancestor?

12. Natural selection only works with the genetic information available and tends only to keep a species stable. How would you explain the increasing complexity in the genetic code that must have occurred if evolution were true?

13. When, where, why, and how did
a. Single-celled plants become multi-celled? (Where are the two and three-celled intermediates?)
b. Single-celled animals evolve?
c. Fish change to amphibians?
d. Amphibians change to reptiles?
e. Reptiles change to birds? (The lungs, bones, eyes, reproductive organs, heart, method of locomotion, body covering, etc., are all very different!)
f. How did the intermediate forms live?

14. When, where, why, how, and from what did:
a. Whales evolve?
b. Sea horses evolve?
c. Bats evolve?
d. Eyes evolve?
e. Ears evolve?
f. Hair, skin, feathers, scales, nails, claws, etc., evolve?

15. Which evolved first (how, and how long, did it work without the others)?
a. The digestive system, the food to be digested, the appetite, the ability to find and eat the food, the digestive juices, or the body’s resistance to its own digestive juice (stomach, intestines, etc.)?
b. The drive to reproduce or the ability to reproduce?
c. The lungs, the mucus lining to protect them, the throat, or the perfect mixture of gases to be breathed into the lungs?
d. DNA or RNA to carry the DNA message to cell parts?
e. The termite or the flagella in its intestines that actually digest the cellulose?
f. The plants or the insects that live on and pollinate the plants?
g. The bones, ligaments, tendons, blood supply, or muscles to move the bones?
h. The nervous system, repair system, or hormone system?
i. The immune system or the need for it?

16. There are many thousands of examples of symbiosis that defy an evolutionary explanation. Why must we teach students that evolution is the only explanation for these relationships?

17. How would evolution explain mimicry? Did the plants and animals develop mimicry by chance, by their intelligent choice, or by design?

18. When, where, why, and how did man evolve feelings? Love, mercy, guilt, etc. would never evolve in the theory of evolution.

19. How did photosynthesis evolve?

20. How did thought evolve?

21. How did flowering plants evolve, and from what?

22. What kind of evolutionist are you? Why are you not one of the other eight or ten kinds?

23. What would you have said fifty years ago if I told you I had a living coelacanth in my aquarium?

24. Is there one clear prediction of macroevolution that has proved true?

25. What is so scientific about the idea of hydrogen gas becoming human?

26. Do you honestly believe that everything came from nothing?

After you have answered the preceding questions, please look carefully at your answers and thoughtfully consider the following questions.

1. Are you sure your answers are reasonable, right, and scientifically provable, or do you just believe that it may have happened the way you have answered? (Do these answers reflect your religion or your science?)

2. Do your answers show more or less faith than the person who says, “God must have designed it”?

3. Is it possible that an unseen Creator designed this universe? If God is excluded at the beginning of the discussion by your definition of science, how could it be shown that He did create the universe if He did?

4. Is it wise and fair to present the theory of evolution to students as fact?

5. What is the end result of a belief in evolution (lifestyle, society, attitude about others, eternal destiny, etc.)?

6. Do people accept evolution because of the following factors?
a. It is all they have been taught.
b. They like the freedom from God (no moral absolutes, etc.).
c. They are bound to support the theory for fear of losing their job or status or grade point average.
d. They are too proud to admit they are wrong.