Cycling Problem - Stuck

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KellyQ68

Feeder Fish
MFK Member
Jul 2, 2018
21
9
8
Maryland
This is my 7th tank set up over 50G and I have never had this happen.

50g SeaClear System II - Set up 6 weeks ago. Added fish 4 week ago.

I have not been doing fishless cycling and so far I have not had any issues - minor short spikes in ammonia and nitrites as they moved through the cycle and done.

However the difference is the tank/filtration system. I normally use Fluval canisters on my 55, 75 and 90’s. So I am leaning toward the system II filtration system being the difference in my cycling.

Last week my ammonia spiked - and spiked - and spiked. I tried everything but when I lost one fish and was making no progress I moved my fish to a QT tank. STILL - ammonia is off the charts.

Using API master freshwater test kit - readings and tap water are not the problem. Accurate readings on all other tanks and tap water levels are not elevated. Zero across the board.

I have tried seeding the tank with substrate from my existing tanks, water changes like crazy, adding bacteria supplements (Colony), and finally today I took it down 50% and added filter media and water from my Fluval 405. I practically starved the fish while they were in there trying to get past the ammo spike and fish have been out of tank for 3 days. No change! Ammonia still off the charts, zero nitrites and nitrates. Just added another dose of Colony because I realized that when the fish were in the tank, the addition of AmmoLock probably rendered the Colony ineffective. Still - I am losing my mind here - why is it stuck and what more can I do to get this thing to cycle?!?

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This is my 7th tank set up over 50G and I have never had this happen.

50g SeaClear System II - Set up 6 weeks ago. Added fish 4 week ago.

I have not been doing fishless cycling and so far I have not had any issues - minor short spikes in ammonia and nitrites as they moved through the cycle and done.

However the difference is the tank/filtration system. I normally use Fluval canisters on my 55, 75 and 90’s. So I am leaning toward the system II filtration system being the difference in my cycling.

Last week my ammonia spiked - and spiked - and spiked. I tried everything but when I lost one fish and was making no progress I moved my fish to a QT tank. STILL - ammonia is off the charts.

Using API master freshwater test kit - readings and tap water are not the problem. Accurate readings on all other tanks and tap water levels are not elevated. Zero across the board.

I have tried seeding the tank with substrate from my existing tanks, water changes like crazy, adding bacteria supplements (Colony), and finally today I took it down 50% and added filter media and water from my Fluval 405. I practically starved the fish while they were in there trying to get past the ammo spike and fish have been out of tank for 3 days. No change! Ammonia still off the charts, zero nitrites and nitrates. Just added another dose of Colony because I realized that when the fish were in the tank, the addition of AmmoLock probably rendered the Colony ineffective. Still - I am losing my mind here - why is it stuck and what more can I do to get this thing to cycle?!?

View attachment 1327303


Is that live rock?
 
Also check the API expiration dag on the test kit.
Sorry for the double post . I personally would do only smaller water changes and remember the live bacteria needs food so either add a hardy fish or throw in a shrimp and let nature take its course.
 
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