Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (
-   Beginner Freshwater Aquarium (
-   -   day 7 of new 56G - nitrate 20ppm (

Persephone 04-25-2013 06:09 PM

day 7 of new 56G - nitrate 20ppm
Hi all,
I'm new to the forum and newly setting up a 56g tank after a 20 year break. I am on day 7 of a fish cycle with 7 black widow tetras and a fairly well planted tank.

My readings for day 1 to 6 have been 0 for NH4, NO2 and NO3.
Just tested again this morning and I am zero for NH4 and NO2 but showing 20ppm for NO3.

Ph started out pre-fishat 6.8 but holding at 7.0 and GH is about 60 after adding some hardness salts, kH is 0.

Can I have advice about where I might be in the cycle please? I understand that plants can absorb NH4 so that the cycle goes faster? Otherwise I appear to have gone from 0-100 in one night? Isn't the cycle also over when NH4 and NO2 return to zero? What about when they never went up though?

and also, am planning on doing first partial water change tomorrow morning (saturday) but with nitrate at 20ppm should I do it today?

ETA my tests are working as I have also tested on a goldfish bowl where NH4 is rather high.

MoneyMitch 04-25-2013 07:10 PM

have you tested the cource water? might have nitrates in them - I do in mine

you have plants in there too right?

Persephone 04-25-2013 07:14 PM

Hi Mitch, yes there are about 5 bunches of 6-8 stemmed plants as well as 3 small crypts in the tank. :-D

Source water is 0 for all Ns.


MoneyMitch 04-25-2013 07:17 PM

are you adding any fert for your plants? ferts will show as nitrates

Persephone 04-26-2013 03:54 AM

No fert yet. Popped out at lunch time and bought specific tests for NO2 and NO3. Readings this afternoon were 1ppm nitrite and 10ppm for nitrate. Just going to keep monitoring daily now. I'll do my first partial water change tomorrow.


beaslbob 04-26-2013 04:30 PM

An initial nitrate spike of 20ppm is normal for planted tanks along with unmeasureable ammonia and possibly a 1 day very small nitrIte spike.

nitrates will drop down in about 3 weeks as the aerobic bacteria build up and start consuming the ammonia instead of the plants. Ph will also rise.

So it looks like you got a good planted "cycle" going.

my .02

Persephone 04-27-2013 06:54 PM

Just a quick update about the levels in my tank.

Yesterday - Day 9
NH4 - 0
NO2 - >1ppm
N03 - 10ppm

Today - Day 10
NH4 - 0
N02 - 0
NO3 - 5ppm

I will keep testing - but does this mean I am close to cycled? How much longer do I need to wait before I can stock the tank?

beaslbob 04-27-2013 10:04 PM

sounds like you're getting there.

Byron 04-28-2013 11:30 AM

Add some (a few) fish now. The plants will take up the ammonia/ammonium.


Persephone 04-28-2013 04:30 PM

Happy dance!

All times are GMT -5. The time now is 11:24 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

For the best viewing experience please update your browser to Google Chrome