There are bubbles on the top of my fish tank, is that a good thing?

Question

I have one of those bubble things for my tank to put oxygen in the water. I woke up this morning and there is lots of foamy bubbles on the top of the tank. It's a ten gallon tank and it only has four fish. Two were dead this morning. I tested the amonia level and is was next to none. They are little molly fish. The only other thing i could think of is that we don't have a working light for the top of the tank. The thermometer says it's 69 degree F. Is the water to cold?

Answer 1

With the bubbles foaming up, something is blocking the oxygen from directly dissolving into the water. I'd suspect something like soap or an oil in the tank and that also would be what would cause the fish to die as well. Is this tank new? Checking the ammonia was good, but if the tank has already cycled out, that would not come into play. Ammonia would not block oxygen dissolution into the water. The temp does seem a little low. I'd try to slowly raise that up to about 78 if you could. The increased temperature may help solve the oxygen problems, but I suspect an unknown chemical being in the tank causing this.

Answer 2

It is difficult to trouble shoot your problems w/o more info, such as how long the tank has been operating, the type of filter, pH level and other tank chemistry. But, though 69F is a bit cold for tropical fish it should not kill them. If you don't have a heater in your tank, your temps may have fallen lower during the night. A tank heater is necessary for tropical fish as they need water at about 72-78F. The light on the tank is not necessary except to better view your fish. Did you also check the nitrate/nitrite levels.

Sometimes fish just die.

The bubbles were likely caused by oils from the dead fish. And, no, bubbles that stay is not a good thing. The bubbles from the air stone should pop rather quickly.

Answer 3

The bubbles indicate that your tank has too much phosphate.The source of phosphates in aquaria is fish food. You are overfeeding.How much ammonia is "next to none"? Any ammonia indicates the there is something wrong with the tank's cycle. Did you check Nitrites? They are just as toxic as ammonia.
68 degrees is on the low end of the mollies range,but should be OK for the fish.
No light should not be a problem.
I'd bet you've got a dirty tank,so start doing water changes,every day or so. They must be small,no more than 20%,and should be accompanied by gravel vacuuming to remove the "stuff" in the gravel.

Answer 4

That's definitely too cold. You need a heater in the aquarium and it needs to be kept between 74 and 82 degrees- I keep mine at 76 degrees. Also, 10 gallons isn't big enough for 4 fish of that breed. Get a heater from the pet store immediately and keep the water around 76 degrees or your other fish will die.

Answer 5

What fish? If it rather is a Betta it rather is their way of breeding and the deliver a gaggle of bubbles up yet will basically be in one particular spot. If it somewhat is greater sudsy and foaming masking the full outer ring of the tank then it rather is a Protein construct up that's amazingly unstable to fish in that quantity. Do a 50% water replace and you may desire to be arranged. i could replace you carbon in case you have any too.

Answer 6

Need heater and the bubbles could easily be a ammonia problem. The tank is large enough for mollies but not adequately set up for them.

Answer 7

It shows some oxygen is high in there. I hope that the water is not too cold, because that would not be a "good sign." Peace, Love and God Bless.

Answer 8

try heating the tank a certain degrees.

that temperature is way too cold.