Question: Nitrates down, no water change

Tenuto

New member
Joined
Dec 16, 2019
Messages
1
Reaction score
0
Points
0
Location
Florida
Country
United States
Hi everyone, I'm new here and have been loving all the informative threads. That being said, I have a cycling question.

I'm cycling a tank in prep of getting an axie. The tank atm only has a HOB filter and a sponge filter as well as a glass jar inside.
On New Year's Eve (after about 2.5 weeks of cycling) I saw what what appeared to be my Nitrate spike; it was up to around 40-80 ppm. Awesome. Ammonia was down to about .25 ppm so I added more ammonia and went about my night.
Now, coming home from work I tested 3 times to be sure and Nitrate is down to about 5 ppm. I haven't done a water change so I was wondering if anyone had any idea as to what might've caused such a drastic change. Has anyone seen this before?

As a side note, ever since I added the sponge filter I've noticed some black debris along the bottom of the tank. Could this be the cause? I washed the sponge before I put it in but the only causes for this that I can think of would be that the debris is from the sponge filter or from the activated carbon in the HOB filter. Would a water change be in order? I don't want to interfere with the cycle needlessly.

Thanks in advance!
 

NaterPotater

New member
Joined
May 18, 2015
Messages
177
Reaction score
3
Points
0
Location
St. Louis, Missouri
Country
United States
Any chance you've got algae growing? Doesn't sound like that's what the stuff at the bottom is, but there ARE nasty types of algae that are very dark and fuzzy. Nitrate is difficult to get rid of even by doing water changes, so I really can't think of a reason it would go away on its own other than big/frequent water changes or something consuming it like plants or algae. High nitrate causes algae to grow.
 

Kitan

New member
Joined
Nov 13, 2019
Messages
101
Reaction score
4
Points
0
Location
Ontario
Country
Canada
Yeah, I was thinking similar to Nate that it may be some kind of algae. If you DO have algae, that does eat up nitrates and 80ppm will encourage algae.

What are your nitrites and pH at? Temperature? These things can cause your cycle to crash, which is why I am asking.

Yes, you should do a change. A water change shouldnt mess with your cycle much, since beneficial bacteria live primarily within your filter media.

As a great tip, you could include some bio rings or bio balls after the charcoal in your HOB filter to give the bacteria another place to live :)
 
General chit-chat
Help Users
  • No one is chatting at the moment.
  • Nioa:
    are you in quarantine right now, or are you working?
    +1
    Unlike
  • John:
    I'm staying home 24/7 with the kids. Only my wife goes out. She's an infectious disease physician
    +1
    Unlike
  • Nioa:
    ah, that sounds pretty necessary right now.
    +1
    Unlike
  • John:
    Testing
    +1
    Unlike
  • Chat Bot:
    John has left the room.
    +1
    Unlike
  • Chat Bot:
    magpie3 has left the room.
    +1
    Unlike
  • bellabelloo:
    Hello chat room 😊
    +1
    Unlike
  • KellLvsHurLotl:
    hi new here
    +1
    Unlike
  • Viking:
    There are not many people here!
    +2
    Unlike
  • blocboyjking:
    just got some danubes theyre still larvae any one have any tips?
    +1
    Unlike
  • Viking:
    Feed them live food either daphnia or black worms. How old are they?
    +1
    Unlike
  • Chat Bot:
    Guest Anthony has joined the room.
  • (Guest) Anthony:
    hello
  • (Guest) Anthony:
    I am here seeking answers to my salamander problems
  • Chat Bot:
    Guest Johnny5 has joined the room.
  • (Guest) Johnny5:
    This is such an awesome site!!! I can't wait to meet other people who keep salamanders!
  • Chat Bot:
    Anonymous User has left the room.
    +1
    Unlike
  • Chat Bot:
    Anonymous User has joined the room.
    +1
    Unlike
  • Chat Bot:
    Anonymous User has left the room.
    +1
    Unlike
  • winter.shadow:
    Can someone please give me advice asap
    +1
    Unlike
  • Chat Bot:
    John has joined the room.
    +1
    Unlike
  • John:
    Good evening
    +1
    Unlike
  • Chat Bot:
    John has left the room.
    +1
    Unlike
  • Chat Bot:
    John has joined the room.
    +1
    Unlike
  • Chat Bot:
    John has left the room.
    +1
    Unlike
    Chat Bot: John has left the room. +1
    Top