Waterchanges PH swing

Hi,

I was wondering, I do the EI dosing with the weekly waterchanges (50%) and after the waterchange the PH goes from 6.6 to 7.1 a 7.2 according to my probe(Tapwater is 7.6) KH is 4degrees. (According to the testkit )

I did the EI dosing and waterchanges without fish, but will this PH swing not harm the fish if I put them in next week? Stock will be mainly tetra's and some loaches and Cories. Tank is 75 US Gallon.

If so, what is the best route to go? Lesser but more frequent waterchanges? Or must I prepare the tapwater to a more matching PH? If so, how?

Thanks in advance

Evert

 

Thanks Tom,

That is a relief.
One question though, I one time did a 90% big waterchange to get rid of GW, and my harlequins went directly belly up when i poured the water in, Temp was fine, so I really thought it was a PH issue, I had a small 10 gallon next to the 75 and could safe at least a bunch of them to catch them fast and trow them in the 10 gallon but it scared the s*** out of me.

But thanks for clearing this thing up

Evert

 

Yes Shane, I used Amquel. Maybe, the more I think about it, it was a temp issue after all, I poor the water straight from the tap (Cold/warm mixed) and handfeel for the right temp. if I am a degree of it should not matter normally with a 50% WC, but with the 90% WC it probably did matter.

Evert