PH Issue with Pellets.
I just upgrades my system 2 weeks ago and I've been battling PH issues ever since. Everything else is good with my readings. I've been increasing my ALK to deal with the lower PH.
Here's a little more info so you have all of the facts.
1. I was running a 90 Gallon sumped system with 500 grams of Bio pellets in a small reactor. I was using this for about 3 weeks prior to the upgrade. It worked great and in those 3 weeks I had a noticeable reduction of cyano. Everything was great.
2. During my upgrade i unplugged my NP reactor for 4 days!!! I has some unexpected plumbing issues so my 4 hour transfer ended up being 4 days. Everything did survive except of a Monti piece that was already struggling. I fragged it in time to keep it though.
3. I used about 30lbs from my old sand. 3 days after everything got transfered I noticed a large Dino out break. I think anything of it but now I figured it was probably from the Bio pellets. figured because I has the reactor off for 4 days that the live bacteria died and released some nasties back into the tank. good thing I have a solid skimmer! It could have been the old sand too, or probably a combination of the 2.
4. I used to have no issue with PH. In fact my PH was always stable around 8.35 during the day and rarely fell below 8 at night. That was with an Alk reading of 7.8dkh.
5. My readings are accurate as I brought them into my LFS to double check them.
So the question is... do these pellets increase Biological acid waste which decrease the PH? I'm thinking yes. What are your thoughts on this?
Also... I have the outlet of my reactor aimed directly at my Simmer intake.
Current PH is 8.08 during the day and 7.86 at night. Current ALk reading is 8.0