Just checked my fry tanks' water params and the PH was so high at 8.1.Ammonia 0,nitrite 0,nitrate 20.All this time the PH was always stable at around 7~7.5 and now I'm worried again.Is this okay for my frys or should I try to lower it instead?

Wow, thats quite a jump! Over what period of time did that happen, when did you test the pH the last time?
My fry's pH is high as well, around 8.4, and they are fine. As long as there isn't any ammonia in the tank, which is so much more toxic at a higher pH, the fry should be fine.
Although I am wondering what caused the jump. Did you add anything into the tank lately, any decor? Did the tap water see a rise in pH?

No I did not add anything new but I took a plant out which I assume has nothing to do with PH right?Last time I checked 4 days ago it was 7.5 and today it's 8.1 I wonder why?Thanks Andrea

Do a KH test if you can. Also test your source water pH & KH.

The frys can handle the high pH, just not a big sudden jump.

I do not have a KH test at the time but I will get one and post the results asap
Thank you

Went out to get a KH test and they did'nt have any(what else is new )I tested PH again and today it is 7.9 from my fry tank,PH from tap is 7.9 as well.Thanks

That is the weirdest thing! If the store offers free testing, get a water sample down there and have them test the kH and gH.

Is it that bad?

I don't think they'll test the water for me because the last time I asked if they could test nitrates they said we don't provide that kind of service if I remember correctly I'll just try and find the test kits myself.I'm sure at least one store will have them.Thanks

Well, on one hand, the fact that your tank pH is the same as your source pH is reasonable but on the other hand, how come you had a different tank pH reading before when you used the same source water. Odd.

I think the KH test in this case is probably more informative than absolutely critical. If your pH is 5.9 then I would be jumping up and down screaming for a KH test.

I think it really is odd I have 4 tanks running and they all have different PH readings.Any chance it has to do with the digital PH meter I'm using?Up until now I have been using strips which I was told aren't that accurate so recently I got a digital PH meter.Is it possible that it is not accurate

The different pH in the different tanks might be due to different amounts of dissovled gasses, maybe. Just a guess really. Or the water company might be using a different water source with different pH, Emma i think was saying she found a jump in her supply pH and when she got the water report they had started using a different reservour (sp?).

Hope your fry are ok, my two goldies are in pH 8 all the time and they are happy, just as well really because our water is so hard i think i'd have problems lowering it.

Aquarium Pharm do a kh and gh test kit if you can find it.

Most of the time we don't think about this but if you want to get technical about it, the by-products of the nitrifying process are mild acids. The CO2 that the fish breaths out also increase the acidicity of the water. In fact, if left alone without buffering, the natural tendency in a fully stocked fish tank is to become more and more acidic over time. So it is not unusual to get different tanks with different pH depending on the filters used and fish load.

Thank you for explaining that When you say buffer I assume you mean doing water changes,right?

Anyway,I'm going out and look for a KH test.Hopefully I will find one today.
Thanks

No, buffering refers to the tank's ability to handle pH swings. High KH equates good buffering. Low or zero KH means poor or no buffering. With good buffering, the pH might be rock solid or might only changes by 0.1 or 0.2. With little or no buffering, the tank can go into a pH crash with little warning.

Thanks again for explaining that I thought I needed to do more water changes to stabilize Ph.

I haven't found any KH test kit yet Are my frys going to be okay with different PH everyday?It tested 8 today and I'm worried it will affect them somehow.At the time they're doing fine though Thanks..

How big is your tank?

If it swings between 7.9 and 8.1 from day to day is not so bad.

Fry tank's 10 gallon with 3 frys and 3 panda corys.I guess I'll just check the PH more often to be sure there'll be no PH crash. Thank you very much

Yeah, by all means, check the pH more regularly but you are far from a pH crash. That is way down below 6 and heading south. For you to go from 8 to 5.6 will be worse than a rollercoaster ride.