BUBBLES!!!!

Hi all,
I have this really weird (but important) question~
How do I reduce the amount of bubbles in my 3 1/2 gallon plant nursery tank so my little baby plants can get light? I have one power filter(10 gallon filter, actually) and an undergravel filter. The undergravel is producing WAY too many bubbles. I know some medications (like melafix) froth, but Melafix has never been in this tank!
the only medications I used were (It used to be a hospital tank):
Maracyn
AmQuel+
Bio-coat (by marineland labs)
Antifungus medication (made by AP plus, has malachite green in it)

Thanks so much!!
Robin

P.S. Water parameters are:
pH-7.2
amm.- 0
pics are attached

If this is a plant nursery, you don't need any filters, certainly not an undergravel. If that is the cause of your problem, turn it off.

Yeah, turn it off and the bubbles would worry me too - why so much?

ALASKA

Possibly from high ammounts of Phosphates in there.... Check out this.... It is the wall of foam we had last spring in my town.

http/www.dundeeonline.com/articles/12.1.2003.html

One word, tsr770, WHOA!!!!!!!!!!!!!! And I thought my bubbles were bad!

Well, are there any phosphate tests I could do, and where could I get them? I've actually had phosphate problems in this tank before, It was my grandma's old tank (no not REALLY old, she got it a few years ago, then lost interest) and it still has some lyme deposits that I can't get off!!! I asked my lfs what to do (the water looked like milk) and she said the tank was so small, it wasn't worth treating with the phosphate-reducing stuff (whatever you call it, i think it's phosban or something) she said to use live plants. It worked great, but I'm not sure it cleared it up entirely!! There should be some other products out there, I'll check it out.
Thanks so much guys!!!
Robin

There are phosphate test kits available, but you usually won't find them at chain stores. Sometimes local shops have them.

Is it really ok if I turn off the undergravel and just let the power filter run? It won't have any adverse affects?
Thanks so much!
Robin

Like Lateral Line said if this is JUST a nursery tank then you do not need any filtration. so yes it is safe to turn off the ugf. In fact it is advisable as plants generally do better if no ugf is used in the tank. Good luck

Even if it had fish in it, a tank that size with a power filter would not need a ugf as well. If there are no fish in it, then the bacterial colony in both filters would die off after a short period, they are not receiving any nutrients, (ammonia and nitrite), so they are not acheiving anything anyway.

As for phosphates, unless you have phosphates in your tapwater, (possible), the phosphate is coming from somewhere. The commonest source of excess phosphates in tanks are these pH adjusting powders. Are you using these?