Another sand rinse success story.
This tank is a 20 gallon FOWLR that has been suffering from a wicked green cloud in the tank. when viewing, not a single fish could be seen. tank has been up and running 2 months according to the owner. 5 fish, 20 lbs live rock, hang on back filter rated for a 55 with carbon filters. Basic setup.
Initially the owner wanted to do a 100% WC. We removed the rock into a bucket of clean saltwater, drained enough water to be able to actually see the fish and catch them, then removed and discarded the remaining water. I suggested we rinse the sand and dunk the rocks in clean SW until...clean! The owner was on the fence as most are when it comes to rinsing sand. He asked the usual, "will this kill my bac in the sand? will it cause a new cycle?" I told him the majority of bac is in the rock and that there sand would lose some but not all.
BTW, everything I have learned on this topic is from Mr. Brandon429. He deserves all the street cred for being a true renegade in this community set forth by the seasoned vets. Moving forward.
No garden hose available. We took the 20 long right into the bath tub, first putting towels down so that the edge of the tank didn't support all of the weight. the water wouldn't run directly into the tank so I had the owner hold a dust pan to make a water slide. we also used 2 siphon lines to siphon the silt out of the water column as we both hand stirred the substrate. It took 30 minutes to get prob 95% of silt removed. Owner was happy with his drop test (where you take a handful of sand from the bottom, drop it at the water line and observe no cloud). Then we set it back up.
we were not gentle or cautious when returning 15 gallons of fresh SW to the tank. We dumped it in! Cloud cleared for the most part instantly. SUCCESS!!!
We set up 3 buckets of clean SW to wash the rocks. 4-5 dunks per bucket to removal all detritus, then returned to tank. It took 1 hr in total. Now the owner can reset the tank anytime things go astray. I hope this can help provide yet another example of how effective
@brandon429 guidance can be.
Hats off to the owner for taking the leap and becoming a "rinser"!