Crushed coral or activated carbon, or both?

Dr. Awkward said:
Sounds like old tank syndrome to me. It can happen fast to tanks with messy fish. I'm guessing you don't siphon the gravel because of the plants?
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This is true. I don't. I should? I thought that would increase my nitrates too much.

About the piranhas and guppies. That was a joke. I've got 1 angel fish, 1 rainbow fish, 2 cory catfish, 12 silver tip tetras, and 3 h. rasporas. They don't really seem that messy(nitrates stay around 10 or 15 ppm. So, how does one get rid of the phosphates?
 
dolomite? You mean the movie? It's pretty good but i didn't know it could remove phosphates. Do I just dip the vhs in the tank, or should I crush it up with a hammer and put it in my canister filter?
 
So, I added CC and seachem's seagel. Which is, by the way and to my disappointment, nothing like a seagal or seagull. I was kinda hoping it would be. None-the-less. in the past 24 hours my ph has been going up and up. from below 6 to 6.8 in one day, oh, I'll be so lucky if no one dies.

I think I remember reading somewhere that it's easier on the fish to go to a more alkaline water than acidic. I've already taken half of the CC out in hopes of slowing the rise down . So, What's the real story? Anyone had this happen? Anyone lost a whole tank full of fish this way? Thanks
 
how heavily planted is your tank? I dose some phosphates for them, and nitrates as well. Go ahead and vacuum your gravel around the plants as much as possible. If you aren't having algae problems I would skip the phosphate remover.
 
rpmsongs said:
dolomite? You mean the movie? It's pretty good but i didn't know it could remove phosphates. Do I just dip the vhs in the tank, or should I crush it up with a hammer and put it in my canister filter?
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lol....
No it's a mineral. It'll lower the pH in your tank and also establish a buffer.
 
Thanks everybody! looks like everyone's going to be fine. brown algae is disappearing after only a few days even though I've recently upped the lights. And I'm glad you said something, I canceled my order on amazon.com for the dolomite boxed set.
 
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