First ULR phosphate test?

[Harry g]

I just tested my water with an ULR phosphate Hannah checker and it shows a value of 0.03? Should I just keep doing what I’m doing or? I’m doing water changes every week or two and try to feed whatever my livestock can eat in 30 seconds here’s the stock in my tank:

4 margarita, 4 Nassarius, 4 Astrea, 2 Trochus, 1 black clown, 1 black storm clown, bangai cardinal, 1 gsp coral, 1 montipora frag, 1 yasha goby, 1 rbta, 1 candy cane kryptonite, 1 war coral, variety of zoas, 1 toadstool, 1 Kenya tree, 1 RFA, 1 Octospawn, 1 Hawaiian cleaner shrimp

Alk test 12/27/2025: 9.4 dkh

All test 01/07/2026: 9.1 dkh

ULR PHOS 01/10/2026: 0.03

The tank is also about 105 days old, and all my corals are pretty small.

 

[rishma]

I think it’s ok for a new tank but lower than I’d like. Your actual phosphate is 0.01-0.05 accounting for the test error.

I try to stay above 0.1 because bad things happen in my tank when phosphate is too low but all seems well 0.1-0.3. A little lower than 0,1 is fine in my tank but I give myself some margin to stay clear.

I recommend you do some more tests and observe the the trend. Feeding more is fine if you decide to raise it.

 

[dvgyfresh]

All life in the tank requires phosphate , so I like to run it closer to .1ppm

 

[Randy Holmes-Farley Verified Community Expert]

and try to feed whatever my livestock can eat in 30 seconds

Once a day? Multiple times a day?

 

[Harry g]

and try to feed whatever my livestock can eat in 30 seconds

Once a day? Multiple times a day?

Well honestly once a day I just take a small container from my fridge about the size of a pudding cup, fill it up to about 1/4 with saltwater than I put a cube of frozen mysis with spirulina, take a 3ml pipette and squirt it in, I do that twice when feeding, I think when I said 30 seconds it was an underestimate, the frozen cube lasts me about 3-5 days.

 

[Dan_P]

Well honestly once a day I just take a small container from my fridge about the size of a pudding cup, fill it up to about 1/4 with saltwater than I put a cube of frozen mysis with spirulina, take a 3ml pipette and squirt it in, I do that twice when feeding, I think when I said 30 seconds it was an underestimate, the frozen cube lasts me about 3-5 days.

You are possibly starving your fish.

 

[Randy Holmes-Farley Verified Community Expert]

I'd try feeding more.