 get a refund
Fish dont like to swim upside down, unless they are an upside down cat or some other confused species, get a refund. Changing the water and the filter media could cause another mini cycle for the bacteria to "re-group" (depending on the severity of the change), which could account for the fish near the surface (along with ph level and dissovled O2 level).
I would personally avoid keeping goldfish with tropicals. Their requirements are very different. Goldfish also have special requirements in terms of filtration as well because the eat a ton and therfore produce a lot of ammonia.
Welcome to 3reef, fairly new here myself.
Good luck
Travis
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-125gal,, Odyssea 4x96 2 actinic 2 12000k with 12 led moonlights, Odyssea 1000 return pump, SCWD powered by Odyssea 1000, Coralife Super Skimmer 125, 250 lbs sand, 121 lbs of live rock, galaxia, green polyp leather, xenia, frogspawn, goniopora (oops), bubble coaral, hydnophora, multiple polyps and zoas, Yellow tang, mandarin, yellow tail damsel, cleaner goby, lots of snails, 6 blue leg hermits, 2 peppermint shrimp.
-55gal soon too come reef |