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This is a discussion on nitrates within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> i just dont get it!!!! i cant keep my nitrates down for nothing....ive had the tank for 3 months and it was already set ...

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Old 08-07-2008, 01:42 AM   #1

i just dont get it!!!! i cant keep my nitrates down for nothing....ive had the tank for 3 months and it was already set up previously when i bought it. they constantly stay at dangerous levels. treat it all the time and just cant get it to go down.. constant 20% water changes.... HHHEEEELLLPPP ME!!! not such a big deal but kinda same thing for the ph!
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Old 08-07-2008, 01:52 AM   #2
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what do you currently have in the tank?(fish,decorations,gravel etc.) what are you currently adding to the tank? ( chemicals, etc. ) what kind of filter?
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Old 08-07-2008, 02:31 AM   #3
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Is this the 90 gallon in your tank blurb?

Have you tested your tap water for nitrates? You might need to do larger water changes than 20%. Also, do you gravel vac at each water change?
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Old 08-08-2008, 01:53 AM   #4

yes this is my 90 gallon tank... i have 5 fake plants... and some other im guessing plastic items... rena xp3 filter i cant remember the chemicals im putting in there i belive its prime something to help nitrates... no i havnt done gravel vac its a very tall tank and a pain to get that far down( id have to go swimming) lol its a corner tank so its higher....i havnt checked my tap but im gonna have to!!! any certain chemical i should try???
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Old 08-08-2008, 02:09 AM   #5
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python makes some pretty decent length adapters for their units for cleaning i think will even do custom length ones if you order from there. without cleaning the bottom there is probably just a lot of fish waste down there messing with your nitrate levels. also definitely check your tap to make sure you dont have nitrates or high nitrates.
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Old 08-08-2008, 02:09 AM   #6
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I would stay away from chemicals, as they often create more problems than they solve.

Have you checked for ammonia and nitrites, as well? If both are at zero, then your biological filter is probably just doing its job. How high exactly does your nitrate get? 20ppm and under is ideal. You have to start worrying if it gets above 40ppm. Water changes will always lower your nitrates, unless you've got ammonia/nitrite/nitrates coming out of your tap.

If you're overfeeding your fish, all that decaying fish food could be building up your nitrates. Really getting down into the gravel with that vac can be a big help, even if it means rolling up your sleeves and getting a ladder. Could there be any fish that has died somewhere in the tank that you aren't seeing? A dead animal in your tank is going to be a constant source of ammonia which, as long as you've got the biological filtration in place, build up your nitrates.

After you've checked for all of this stuff and there's still a problem, you might want to just do water changes more often or consider getting some fast-growing live plants, which turn nitrates into biomass. It would be tough picking a fast-grower that your silver dollars wouldn't just devour, but hornwort might work.
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Old 08-08-2008, 07:04 AM   #7
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What are the water parameters of your tap water?
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