For anyone interested, below were the steps i went through.
Tools;
- 6x 5g buckets
- siphon hose
- scrubber brush (meant for dishes) and tooth brush
- Hydrogen Peroxide (lucked out and found one at the pharmacy that had a spray bottle top which is very useful)
- 20lb bag of new sand ( i used new rather than rinsing the sandbed because i had an extra bag from initial setup)
Night Before;
- Mixed RODI and salt. included an extra 5 gallons of water to be used for cleaning
Cleaning day:
Step 1 - tear down and clean
- Checked temp and salinity on new water to ensure it was consistent with tank. once it was good, i started the process
- Removed Corals and CUC from tank and put them into containers of water. Scrubbed coral bases and shells of CUC to remove all algae. I used a light mixture of peroxide and clean salt water to do this. once done, the corals and CUC went into bucket of new saltwater
- Removed everything from the back of tank (sump area). Items coming out included; floss holder, live rock, pump, protein skimmer, intank media basket. Everything got cleaned with water/peroxide mixture and dipped in fresh rodi. it looked brand new
- Attempted to use a turkey baster to blow as much algae as possible off of the rocks. Filled a 5g bucket half full with dirty tank water. Removed all live rock from the tank and put it in the bucket of tank water and set it aside.
-Turned all pumps and powerheads off. left the light on throughout the whole day so i could see what i was doing
- Removed Fish and Shrimp and put them in a 5g bucket of new saltwater.
- Took the 2 powerheads and scrubbed them with a brush while spraying with peroxide. I then put them in a small container of rodi/peroxide and ran them for 30 minutes. once they were clean, i rinsed and put them in the bucket with the fish to keep water circulating.
*total time fish were in the bucket was only 3 hours
- Scrubbed inside of tank walls to get all the algae off glass and back. Drained tank water with siphon
- Scooped and siphoned entire sand bed out of tank. rinsed and scrubbed inside again with tap water and then a final rodi rinse
Now, i had a entirely clean tank so it was just building it again which was the fun part
Step 2 - build
- opened bag of sand and rinsed with tap water for roughly 40 minutes until it was running clear. final rinse with rodi water
- sandbed went into tank and then filled display portion of tank with new saltwater. used the plate method to try to limit sand disruption. sand settled quickly
- put clean equipment into back sump area and filled with clean saltwater. fresh filter floss added
- at this point turned the pumps back on so the tank could run and settle prior to putting fish and rock back in
- the corals and CUC went back into the tank
Step 3 - rock scrub
- set up a station by the sink with tupperware containers of water/peroxide.
- took each rock from the bucket and dipped in peroxide solution for a few minutes prior to scrubbing with brush. Alternated between dish brush and tooth brush and used the spray peroxide bottle as well. After scrubbing i would put it back in the water and rotate it while looking for any algae hanging off. I had 6 pieces of rock and depending on size, spent 5-10 minutes on each rock.
Step 4 - Livestock and rock
- took the rock and placed one by one back into the tank and then put the corals back on rock
- powerheads went back onto tank
- lastly, fish were put back in with no issue
All said and done, it took 5 hours and other than a few $3 bottle of peroxide, it did not cost anything. tank looks brand new and will just need to now monitor progress. Also, need to address root cause which appeared to be 0 levels of phos/nitrates. Where i got into trouble with the algae was when i started over feeding to raise the nutrient levels.
Let me know if you have questions. This was very manageable for a IM30l and next time i could do it in much less time. I would guess for bigger tanks this becomes a lot more work
Cheers,
BCR