1. Blakjax

    Testing Hanna Alkalinity PPM Colorimeter HI755 - Marine Water - $45

    I have a Alkalinity PPM Colorimeter HI755 for Marine Water for sale. This was only used a handful of times and includes the reagents. Add $5 for shipping
  2. G

    Noob KH problem when altering MG and Ca

    Basically my KH is rising and its killing my acro and my tank looks fed up. So i buy my saltwater from my LFS, its mixed at 1.026 salinity, 1300mg 350ca and 8kh. Im dosing into my salt water barrels enough MG granules (Reef advantage) to get my mg to 1450 and seachem liquid calcium, 0.5ml /l to...
  3. S

    pH and Alk

    so i recently tested my tank and im getting 13.4 dKH and low ph somewhere between 7.6 and 7.8 i know i need my pH to be higher but if i start dosing to raise my pH will my alk be too high? i am trying to raise the pH in other ways i.e. more ventilation in the room and such but not having much of...
  4. S

    Do I need to lower my Alkalinity?

    Quick backstory, I have a 32 gallon biocube that's been running for about a year and a half now. I have been coasting well with weekly 5 gallon water changes and given the tank has looked great I had not tested the water for about 2 months. I was preparing to add a new fish and decided to test...
  5. jbonez_


    Hi all, I'm currently struggling with some parameter issues. I've attached at the bottom what my levels are as of this past Saturday and a video of my tank. Right now I'm slowly trying to raise my salinity by topping off with 1.026. My pH has be stable at 8 for about two months. My nitrate...
  6. royaleFork

    Washington Salifert test kits - washington - won't ship

    I have 3 test kits available for sale (calc, mag, alk). I bought them hoping I could use them, but can't since I'm colorblind and can't see the transitions well. They have either never been used or used once or twice. I live in the Woodinville area and would either prefer pick up or Woodinville...
  7. Mattc123

    Alkalinity and calcium dissapearing

    Hi all. Recently I got my hands on a Trident and it has confirmed that something is sucking the life out of my alkalinity and calcium. Before receiving the trident through my normal tests I determined that my alkalinity and calcium was being used up by something of which I have no idea. I have...
  8. jbonez_

    Instant Ocean Reef Crystals dKH

    So I just bought the Hanna Alkalinity tester and just finished testing it and it is showing a reading of 7.6dKH and my pH is about 8, from the research I've done, I read that Instant Ocean usually has a high dKH of 12. My tank is relatively new but I want to start testing levels for corals as...
  9. I

    Alk rising

    Hi all. Looking for some advice on Alkalinity. My Alk is rising without any dosing. I usually keep my tank from 8-8.4 dkh but it’s rising to 10.5 dkh since 9 November 23. I am not dosing anything. I have turned off doser and taken the dosing lines out. My tank is set up since mid...
  10. O

    Low Alk / High Ca

    Hey all. Been following the community over the years now and finally decided to create an account and become more active. I've been in the hobby for ~15 years now. Went from a 25g to my current 40 breeder (bare bottom) ~5 years ago. Unfortunately, I lost interest in the hobby going on a few...
  11. L

    Beginners troubles with chemistry and outbreak

    Hi reefers, I have a preowned REEFER XL425, I started it from very beginning 2 months ago. A week ago it got through cycling so I bought a pair of Nemos, 5 mixed frags, 3 shrimps a 4 snails. Everyone look great. Except the fact, that the chemistry is weird and now the massive green outbreak...
  12. hexcolor reef


    I wanted to write about this subject as I too started to dig into the world of chemistry and became determined to simplify the thousands of words and simple but yet complicated chemistry equations about Alkalinity. come to find out its not that complicated! So let's uncomplicated Alkalinity...
  13. Fish Fan

    New York FS: Hanna Calcium (new) and Alkalinity (lightly used) Checkers

    Hey guys! For sale are a couple of Hanna Checker colorimeters. Calcium is like new, never used. REAGENTS HAVE EXPIRED! Asking $50 Alkalinity is lightly used. NO REAGENTS INCLUDED! Asking $45 Or take both for $85! Prices include shipping and PayPal fees. Please PayPal only, no Venmo, etc. US...
  14. BleachedCoral

    Please help with fading Maxima Clam mantle

    Hello, I purchased Maxima Clam about 3 weeks ago, and noticed that it's mantle has become flaky and cracked, like asphalt that was heavily salted in the winter (It's more clear when you zoom in on the picture). It's receiving about 150 PAR and has low to moderate flow. Alkalinity is at 8.2...
  15. NatReef

    Alkalinity extremely high (14+)

    Hello , I have some serious kh problems over the past 4 months my alkalinity stays above 14 at all time even after wc. But ph is 8.2 My wc water is 8.7 kh And at this point I don’t know what to do or lower it Have tested with Hanna checker dkh Salifert kh Waterbox pen 25 Eheim 75 w...
  16. B

    Parameter question

    Hey all, it's been a few years since I kept a saltwater tank - my expertise is definitely in freshwater and turtles. In the past I had 2 thriving reef tanks with fish & LPS but once my ex and I broke up I kept the freshwater and he took the salt tanks (he was definitely the salt expert!) So...
  17. Lago

    pH increasing with lower alkalinity?

    Hey I was wondering if anyone has an answer to this, but whenever my alk fell to ~8.5 dKH I ended up having a higher pH (8.1-8.2) for a day or 2 before my apex corrected the alk to 9. Whereas when the tank ran around 9 dKH, pH was running around 7.7-7.9. From the reading I've done the opposite...
  18. hexcolor reef


    It’s impossible to keep ALK at 9. I find myself always on the higher end 11-12 / 180-198
  19. T

    New York Hanna 97105 Marine Master $250 shipped

    Selling Hanna HI97105 Marine Master photomer tester. Good+ condition. Tests Nitrite ULR, Nitrate LR, Nitrate HR, Calcium, Alkalinity and pH. Asking $250 obo PayPal Goods & Services shipped. Tests included and in date: Nitrate HR: 40 with 08/2026 earliest expiration Phosphate ULR: 28 with...
  20. C

    Testing Hanna Checkers Bundle

    I have a bundle of Hanna Checkers for sale. It includes the Alkalinity (DkH version), Phosphate ULR, Nitrate High Range, Salinity/Temp Pen Tester, Magnesium (new version), and an Auto Aqua Spin Stir. This would all cost $350+ retail. I am asking $200 SHIPPED. There is a brand new box of...
  21. R

    High Alk, Low Magnesium and Calcium

    Hey everyone, I’m trying to wrap my head around why has my Alk risen and whats depleting calcium and magnesium. And what’s the solution. I recently added a hammer garden (9 heads) and a yumma mushroom and soon after I noticed my Alk jumped to 10 and resulting in depletion of my calcium and...
  22. Luke Schnabel

    Ohio Alkatronic

    Selling my Alkatronic (version with the quieter pumps). Since I moved, I never set this back up on my system. I may regret selling because this is an amazing piece of equipment. Was able to run my system at 8.5dkh for over a year without fluctuation while running this. This unit can really take...
  23. Acrofiend

    California .

  24. Hidden426

    Illinois Hanna Testers - Salinity, pH, Temp, Alk, Phos, and Calcium

    I am getting out of the hobby and have a few Hanna Testers that need to go. I am open to offers but please be reasonable. If shipping is needed you will need to cover the shipping costs. Salinity Tester $45 PH $40 Temperature $30 Alkalinity $45 Phosphates $45 Calcium $45
  25. ravalos2282

    EMERGENCY Water parameters are high!!!!!

    Hello I need help lowering some parameters Salinity 1.025 Temp 78F I attached and image with the rest Please help let me i ow what to do!!!!