The Ideal Q tank setup:
Do not use any liverock! ! ! If u have to treat ich you will have alot of trouble using copper or formalin, as the rock will absorb the meds -making keeping a stable level, and it can leach back into main or DT tank system later on.....keep it simple, just like this - easy to clean, DARK places for the hippo to hide are good too (dark coffee cups/black PVC)....Most hippos will sleep on their side nestled under somthing when it's dark - which makes it tough to fight ich, as when the parasites leave a host, they fall to the bottom to multiply, and guess where Mr. Blue sleeps - on his side, right there....It's a good idea to break down totally and clean out the tank bottom with hot water&scrub with sponge every 4-6 days....
I have used this exact setup for
10 years and it workes perfect..I have a penguin 125 hang on filter/a little baby 201 powerhead/100w heater/and 20watt light......just have to cut open the plastic filter frames and remove the carbon if using meds for treatment.
I have a longnose butterfly and scooter blenny in this tank right now - they been in treatment for ich for 2+ weeks, and I no longer see signs, but will treat for 1.5 more....then put them back into same tank -with no meds, work slowly up to my DT salinity of 1.025, and monitor them for 2 more weeks. if no signs of disease/parasite remain, they will go into one of my 100g tanks. I started out using copper (coppersafe) but the ich was tough to kill off, so I started a dual treatment with copper & formalin....ich dissapeared within days. I do waterchanges every 2-3 days, bout 50% and retreat with copper&formalin afterwords.
hope this helps