Best way to lower ph quickly

[vinhjamin8302]

I want to keep fish from the amazon i.e arowana, arapaima or something in that nature lol arapaima...anyway my municipal water is a whopping 8.4, I've been doing daily ro water changes and it seems to work but slowly, does anyone know a quicker way
I have a 100 gal and I've been doing 15g a day for 3 days, I tested today and I was at 8.0
I also tested the robust to make sure it was actually ro and it tested low neutral I believe
Any tips would be great

 

[HarleyK]

Remember that pH it's a logarithmic scale. That means that pH 6 is 100x more acidic than pH 8.
Changing 15 gal at a time means you'll die of old age before you can measure changes in pH.

Sounds like you don't have fish in the tank, yet. Lowering pH quickly would kill them. But you can without fish easily empty you tank down to a remaining 10 gal and then fill with RO water. Then you'll see neutral pH immediately.

Good luck
HarleyK

 

[FreshyFresh]

The easiest way to do it is to work with the pH of your tap water. The other issue is 100g isn't nearly enough for arowana.

 

[tanker]

The easiest way to do it is to work with the pH of your tap water. The other issue is 100g isn't nearly enough for arowana.

Nor an Arapaima.

 

[vinhjamin8302]

I know 100g isn't enough for an arowana but it's a juvenile and I do plan on getting a bigger tank in the near future, my tap measures like 8.4

 

[vinhjamin8302]

Remember that pH it's a logarithmic scale. That means that pH 6 is 100x more acidic than pH 8.
Changing 15 gal at a time means you'll die of old age before you can measure changes in pH.

Sounds like you don't have fish in the tank, yet. Lowering pH quickly would kill them. But you can without fish easily empty you tank down to a remaining 10 gal and then fill with RO water. Then you'll see neutral pH immediately.

Good luck
HarleyK

This sounds good but man that's a load of 5 gal jugs

 

[OrionGirl]

Most likely the bigger issue will be space, not pH. Unless you are looking to breed, slowly acclimating the fish to your water will be best. In truth, if you are buying locally, talk with your LFS. They probably are keeping the fish in tap water already.