Random fish deaths 2 in one day

[Lavey29]

i mean the o2 during the day i measured it today was perfect so it really must be overnight

02 is typically higher during the day in tanks.

 

[JojoM]

02 is typically higher during the day in tanks.

Ah i see ok so yeah ill be checking in the night and morning now for the next few days and i dont have a fege either

 

[Jay Hemdal Verified Community Expert]

OK i will try those tests and buy an airstone today
would i be good to add meds now just incase of the gill disease
also the blenny is new (got it 2weeks ago) and i believe very young, but seems to be eating fine, but ill check that thread out
thank for all the help
If the CO2 is high what would the solution be
also i should mention my set up is without a sump, i use a canister filter

High carbon dioxide and/or low dissolved oxygen can both be corrected by good aeration. Protein skimmers do that fairly well, so if you have on on the main portion of the tank, additional aeration may not help. If you don't have one, with no sump, you may have this issue.

Jay

 

[JojoM]

Okay so i checkd the the pH last night and this morning and the result are the same 8.0
i even checked the O2 levels and it was also at 10 (thats the best result on jbl marine test set)

 

[PeterEde]

Okay i think this should work

is the water cloudy or does glass need clean

 

[JojoM]

is the water cloudy or does glass need clean

Water is crystal clear, from glass is mostly clean just the sides are somewhat dirty

 

[Spare time]

Its a Fluval 207 with

• Bio-Foam Max
• Bio-Foam
• Carbon 70 g
• Quick-Clear
• Bio-Foam+
• Bio-Max

and im also using a UV filter connected to the fluval 207

This is one reason I don't like canisters. They are not very good at aerating the tank( and are essentially recirculating garbing cans that are a pain to empty). If you don't have a wavemaker/powerhead, I would highly recommend getting one (or a second one)

 

[JojoM]

This is one reason I don't like canisters. They are not very good at aerating the tank( and are essentially recirculating garbing cans that are a pain to empty). If you don't have a wavemaker/powerhead, I would highly recommend getting one (or a second one)

I do have one power head and its on the side of it half way down the tank and last night i added a air stone

 

[Jay Hemdal Verified Community Expert]

Okay so i checkd the the pH last night and this morning and the result are the same 8.0
i even checked the O2 levels and it was also at 10 (thats the best result on jbl marine test set)

Good, that rules out a gas exchange issue (although I've never seen 10 ppm oxygen in a marine aquarium, your test may be reading high).

Jay

 

[Spare time]

I do have one power head and its on the side of it half way down the tank and last night i added a air stone

I would consider addding a second pointing upwards to the surface if possible

 

[JojoM]

I would consider addding a second pointing upwards to the surface if possible

Ok then ill try that, thank you

 

[Spare time]

Ok then ill try that, thank you

Sounds good. The airstone is definitely a good choice like Jay said, but a second powerhead may be more visually pleasing in the long run