I have tried tons of options for fixing my PH issues, and i have to say, the crushed coral was the best thing ive used. Shipping was fast. Support to ensure i added it without shocking my fish was excellent and prompt. Lastly 1lb in my 29g was enough to keep my PH which was constantly dropping below 6.0 to staying at a 6.8-7.0 consistently. I definitely recommend using this.
Stabilized ph at 7 or 7.2 . Added1 bag to 20.g tank now has increased alkalinity at desired level. Clerk helped me with knowing how much to add of coral to get desired results for my tank
Buffers water to about 7.4 would add half of bag wait a week then test ph then add the rest of bag as needed for a 10 gallon tank.
My order shipped super fast and arrived to me sooner than expected. The crushed coral was packed well and worked perfect at raising the Ph in my tank! The code for free shipping sold me! Thank you so much!
This stuff works, I try to stick to Corey's recommendation of 1 lbs to 10 gallons. Only thing to say is give it a rinse before you add it.