HELP!!! PH RISing

[mustang]

Ok.....I have a 75g w/ 2 yellow tail damsels and a sf eel. My ph was at 8.0 2 days ago now its at 8.6 what gives? I have crushed coral i guess?? anyway it has small sea shells in it i guess this is called crushed coral not sure. I also have some rocks not live that the local aq shop said would be ok. I had 2 clown fish that died i guess cause the ph rose. I hope this makes sense. This is my first post. By the way aqarium has been running for about 3 weeks before i added any fish. Damsels and eel look fine and eating fine. Any help would be appreciated.

 

[bdubbya]

What are all of your levels? If it's just been three weeks chances are your tank is not done cycling, which could be what killed your clowns. HTH. Good luck.

 

[krux]

Make a massive water change to start.... i would do at least 20 gallons.
Additionally you can purchase pH buffering products, Kent Marine makes a good one. You need to premix it, be sure to read the directions if you go this route.
If in doubt, always change water!
GL

 

[broomer5]

If I understand you correctly, you set up this 75 let it run 3 weeks ... then added (2) damsels, (2) clowns and an eel ?
This tank is new ... and should be cycled as mentioned above.
What are your ammonia, nitrite and nitrate readings ?
I also doubt that a pH of 8.6 is your current problem. I would not do a water change until you test for nitrogen compounds.
This tank is cycling - I'd bet on it.
Post your test results.
I would suggest returning the eel to the store too, until your tank completes it's initial cycle.