• For a Limited Time the R2R Partner Membership is NOW OPEN! Get some cool swag and chances to win part of over $20,000 in prizes! Click here for more details

Phosphates in a daily swing

Aquarium Specialty - dry goods & marine livestock
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
I would say not. That is a really big fluctuation. Even in a full day I would call that a lot.
Thats what got me scratching my head, the dinos are long gone, i dont have a refugium, i dont even use socks. Havent done a water change in months to the point of having to clean my sump a day ago due to detritus accumulating in the return chamber. I cant explain it lol lets see how it goes when i feed actual fish food.
 

Miller535

Valuable Member
View Badges
Joined
Dec 11, 2019
Messages
1,967
Reaction score
1,596
Location
Pittsburgh, Pennsylvania
Thats what got me scratching my head, the dinos are long gone, i dont have a refugium, i dont even use socks. Havent done a water change in months to the point of having to clean my sump a day ago due to detritus accumulating in the return chamber. I cant explain it lol lets see how it goes when i feed actual fish food.
I did not have a fluctuation as high as yours. But When I was battling dinos 6-8 months ago I would say, I was dosing Phosphate multiple times a week until about a month ago. But at the beginning I would use about .04ppm a day. How is your alk? is it stable? I know that affects PO4 as well.
 

92Miata

Well-Known Member
View Badges
Joined
Feb 26, 2020
Messages
789
Reaction score
1,099
Location
Richmond, VA
@Timfish , even @Humblefish recommends what I am saying, and I would argue that he knows more about the topic then most of us put together.

.

Quote from humblefish

" After the fallow period has ended, you can return your fish to the DT. I recommend doing it one fish at a time, spread out over a couple of weeks. This will give your bacterial levels time to adjust to the added fish bio-load, and avoid a potential mini-cycle/ammonia spike. I also prefer to add back smaller fish first, so they are established ahead of the larger, more aggressive ones. "
This is waaaaay overly cautious.

The population doubling time of the bacteria in our tank that process nitrogen products is about 15 hours. The only way you're going to have an ammonia spike is if the number of fish is totally unsuited for the tank in the first place.


That being said - his comment about adding less aggressive fish first has some merit.
 
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
I did not have a fluctuation as high as yours. But When I was battling dinos 6-8 months ago I would say, I was dosing Phosphate multiple times a week until about a month ago. But at the beginning I would use about .04ppm a day. How is your alk? is it stable? I know that affects PO4 as well.
Has been pretty stable my tank is consuming 10ml of esv b ionic 2 part since all i have are frags. Acros are encrusting fine just got a tricolor valida that hasnt been too happy.

Screenshot_20200923-161743_AquaticLog.jpg
 
Aquarium Specialty - dry goods & marine livestock

Miller535

Valuable Member
View Badges
Joined
Dec 11, 2019
Messages
1,967
Reaction score
1,596
Location
Pittsburgh, Pennsylvania
This is waaaaay overly cautious.

The population doubling time of the bacteria in our tank that process nitrogen products is about 15 hours. The only way you're going to have an ammonia spike is if the number of fish is totally unsuited for the tank in the first place.


That being said - his comment about adding less aggressive fish first has some merit.
I wouldn't add as slowly as humblefish was saying, but I would still stagger it over days like I said in my previous statement.
 
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
You missed my point, who is to say the true readings were 0.10 and 0.03, the true readings could be 0.06 and 0.06 given the margin these tests work at. i.e +/- 0.03.
This is true, but how often will a margin of error happen? It cant be inaccurate every single day for months no?
 

Reef.

Well-Known Member
View Badges
Joined
Mar 12, 2019
Messages
907
Reaction score
739
This is true, but how often will a margin of error happen? It cant be inaccurate every single day for months no?
Every time you use the test...they are basically saying that if the reading is 0.03 then take that as a range of 0-0.06, not a definite 0.03, maybe a good idea to record the range rather than the exact reading, might help you see it’s not such a big variation as you think.

Might also help not to do so many tests, weighting yourself everyday when trying to loose weight Is not a good idea either.
 

Miller535

Valuable Member
View Badges
Joined
Dec 11, 2019
Messages
1,967
Reaction score
1,596
Location
Pittsburgh, Pennsylvania
Every time you use the test...they are basically saying that if the reading is 0.03 then take that as a range of 0-0.06, not a definite 0.03, maybe a good idea to record the range rather than the exact reading, might help you see it’s not such a big variation as you think.

Might also help not to do so many tests, weighting yourself everyday when trying to loose weight Is not a good idea either.
I dont necessarily agree with this. But it may be worth while to try another kit in case your hanna checker is defective. At this point you can't rule anything out
 
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
I dont necessarily agree with this. But it may be worth while to try another kit in case your hanna checker is defective. At this point you can't rule anything out
Btw i also forgot to say that i am using ROX 0.8 carbon. Does carbon remove some phosphates aswell? Only reason i havent taken it out is because i recently treated my tank with interceptor and im removing it.
 

Reef.

Well-Known Member
View Badges
Joined
Mar 12, 2019
Messages
907
Reaction score
739
I dont necessarily agree with this. But it may be worth while to try another kit in case your hanna checker is defective. At this point you can't rule anything out
you don’t have to agree, read your test kit and see what the variance is yourself..the op’s results are all near enough within the margin of error (I’m guessing test kit is 0.03)

If his results were 1.5 one day and the next 0.03 I would be concerned, I think it’s just a matter of testing too much, the tank will fluctuate add the test +/- factor and it will look unstable.
 

Miller535

Valuable Member
View Badges
Joined
Dec 11, 2019
Messages
1,967
Reaction score
1,596
Location
Pittsburgh, Pennsylvania
you don’t have to agree, read your test kit and see what the variance is yourself..the op’s results are all near enough within the margin of error (I’m guessing test kit is 0.03)

If his results were 1.5 one day and the next 0.03 I would be concerned, I think it’s just a matter of testing too much, the tank will fluctuate add the test +/- factor and it will look unstable.
A margin of error should not have it all over the place. And after 6 months of dosing he should be able to day to day get a relatively stable PO4 reading. Especially with the hanna ulr. The only thing I agree with in your statement is that he is testing too much. This is not his first post about po4 and I told him in the last one to test no more then once per day and to try and always test at that time of the day. Multiple times a day will cause some swings in tests
 
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
A margin of error should not have it all over the place. And after 6 months of dosing he should be able to day to day get a relatively stable PO4 reading. Especially with the hanna ulr. The only thing I agree with in your statement is that he is testing too much. This is not his first post about po4 and I told him in the last one to test no more then once per day and to try and always test at that time of the day. Multiple times a day will cause some swings in tests
Yea i agree maybe im just testing too much, i started testing once a day since yesterday, phosphates where at 0.12 at 6pm ( i always test at that time) hopefully it hasnt hit 0 when i check today
 
OP
Marc2952

Marc2952

Valuable Member
View Badges
Joined
Nov 23, 2019
Messages
1,047
Reaction score
610
And here you go, dropped from 0.12 to 0.03 in 24 hours.

20200924_181441.jpg
 

mstoneman17

Active Member
View Badges
Joined
Aug 11, 2020
Messages
226
Reaction score
217
Location
Cary, NC
I use the same Hanna. I doubt that is the margin of error.. I also doubt it’s anything to be extremely worried about. Small amount of GFO in a reactor would probably stabilize it..
 

Reef.

Well-Known Member
View Badges
Joined
Mar 12, 2019
Messages
907
Reaction score
739
A margin of error should not have it all over the place. And after 6 months of dosing he should be able to day to day get a relatively stable PO4 reading. Especially with the hanna ulr. The only thing I agree with in your statement is that he is testing too much. This is not his first post about po4 and I told him in the last one to test no more then once per day and to try and always test at that time of the day. Multiple times a day will cause some swings in test
You maybe right, but if it’s the Hanna test kit he’s using you also have to factor in human error as well, I would think this is more likely the reason for the different lvls, more likely than the po4 fluctuating as his results seems to be suggesting.
 
Corals.com

How many corals do you have in your reef tank?

  • 1 - 5

    Votes: 89 9.1%
  • 6 - 10

    Votes: 131 13.4%
  • 11 - 20

    Votes: 212 21.6%
  • 21 - 30

    Votes: 150 15.3%
  • 31 - 50

    Votes: 157 16.0%
  • 51 - 75

    Votes: 91 9.3%
  • 76 - 100

    Votes: 53 5.4%
  • 100+

    Votes: 97 9.9%

Online statistics

Members online
2,642
Guests online
4,932
Total visitors
7,574
Motorcitycorals
Top