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12 answers

Probably "bad" algae.

Scoop as much out as you can 'by hand' (manually).

Turn your filter to it's highest setting.

Decrease photoperiod (turn your light off!) Algae needs light to grow.

Agitate/stir the gravel bed some to facilitate breaking the algae mat up... This will help your filter suck some of the mat up!

Adding fish that eat algae can only help. Plecos are good, as are otto cats, and chinese algae eaters.

Most important - Do water changes!! This prevents buildup of toxins in the water that 'feed' this type of algae mat. Do a 25% water change. Reagitate your gravel/break up the mat by hand - your filter will absorb more of it.

Wait 3 days, do 25% water change again. Always do at least 10% water change every other week, at a minimum.

Good luck.

2006-09-26 06:45:45 · answer #1 · answered by crazyotto65 5 · 0 0

The brown film is more than likely Algae. This can be caused by a number of things like excess waste or direct sunlight. The best way to remove this from you tank is to do a 20% water change (you never want to take out more than 20-30%). And get one of those things that go on your tank to wipe algae from the glass.To control excess waste in your tank make sure you clean the rocks as well. Buy a gravel vac to accomplish that easily. Depending on you tank size you may want to invest in a pleco. Tank should be at least a 30 gallon for this. They can grow up to 18 inch's. You also may want to buy Algae control for your tank and apply as directed.

2006-09-25 14:40:19 · answer #2 · answered by racha 2 · 1 0

Is your tank pretty close to a window? It might be getting too much direct sunlight. You might want to move your tank and/or get a couple algae eater fish or some snails.

Over cleaning the tank can disturb both the fish and the ph balance of the water.

2006-09-25 13:43:42 · answer #3 · answered by Ms. Roberts 3 · 0 1

You can't stop that from happening you could only control it But that happends when you leave the fish tank light on to long. The Brown stuff is called algee and it's a food source for some fish.

2006-09-25 13:32:26 · answer #4 · answered by Jay 1 · 0 0

Whatever you do, don't introduce snails, they totally take over the tank and don't help the problem of algae. Try cleaning the tank more often so that the brown film doesn't build up.

2006-09-25 14:27:40 · answer #5 · answered by Anonymous · 1 0

If it's a freshwater tank I would recommend a Siamese algae eater. Mine never stops moving and my tank is now as clean as when I first set it up.

2006-09-25 16:29:20 · answer #6 · answered by zachler41 1 · 0 0

It means the tank is dirty and needs to be cleaned. I don't know how many fish you have, but the tank should be cleaned about every 30 days. Aside from natural digestion from fish etc, It can also be exacerbated by over-feeding fish, or too much direct sunlight.

2006-09-25 13:13:06 · answer #7 · answered by stretch 7 · 0 2

get a algae eater but I would recommened a water change at least 50% and a gravel vacc

2006-09-25 13:13:53 · answer #8 · answered by C live 5 · 0 1

go to store and buy cleaner fish they will take care of the stuff several types you can get so ask.they clean the tank of that stuff.

2006-09-25 13:12:21 · answer #9 · answered by lcayote 5 · 0 2

EITHER ALGAE OR FUNGUS, GET AN ALGAE EATING FISH, AND IT WILL ELIMINATE THIS PROBLEM IN ABOUT A WEEK.

2006-09-25 13:11:35 · answer #10 · answered by Anonymous · 0 2

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