Single petro in troph/gobie tank?

[fishlass]

I Recently added a small f1 trew (2") to my tang tank. He seems happy but hides at feeding time, I think him being the only petro and their aggressive eating is scaring him. I Can order more and was wondering if that would make him more comfortable? He is grazing on algae and looks healthy. I Just don't want to get way more fish than my tank can handle when they are adults. The tank is 7' long 150g

[Mastiffman/ Duramax7Man7]

How many fish in the tank currently?

[fishlass]

Before I added him there were 8 1 1/2" trophs, 7 subadult J. transcriptus, 8 subadult L. leleupi, 3 3 1/2" synodontis and 2 6" koi (I left them in after cycling because I waa planning to add 10 more trophs)

I Took out the koi and added the petro 2", 4 1-2" similis, 5 adult Eretmodus, and 7 1" V. moorii. The leleupi are coming out the first time I need to derock it and maybe the julies, I do like watching them graze though. I originally was going with cyps, so I had those two groups in when I switched to plant based feeders.

There is no aggression in the tank right now and they're just moving into the rock area (half the tank). The petro is not being chased or harassed, his poop looks normal, he seems to be overwhelmed by the activity esp at feeding time.
I feed kens troph flakes, kelp wafers, and sometimes repashy (not since the new additions) my water parameters are good except fo 20-40 nitrates, an issue with my well water that I'm remedying with amquel. Hardness is very high, I have a limestone aquifer, the amquel does soften and drop the ph a small amount, it's still between 7 and 8.5. I Do 25-30% water changes, I'm increasing them now because of the nitrate issue. I keep my temp at 76f. Filtration is 2 coarse #5 api sponges and 1 fine #5 api, I squeeze them out once a week. And 2 whisper 70's and a powerhead with a prefilter. Lighting is two 4' 4000k and two 4' 6500k bulbs over the whole tank.
I know it sounds like a bit of a mismash right now.

[fishlass]

Other than thr trophs and shellies I plan on eventually only having one pair maybe two or a trio of everything else. Here's a video link, sorry for crap phone quality.

[swk]

I've never heard of a petro being a shy eater lol. Is it healthy?

[fishlass]

I wasn't 100% sure so I'm treating the tank for bloat just in case. I'll see if his disposition changes. Usually I don't keep any less than 3 of anything. So I wasn't sure if the new tank stressed him, being a lone species, or his being so small with such gregarious tankmates.

[swk]

Apr 12, 2017 23:12:08 GMT -5 fishlass said:

I wasn't 100% sure so I'm treating the tank for bloat just in case. I'll see if his disposition changes. Usually I don't keep any less than 3 of anything. So I wasn't sure if the new tank stressed him, being a lone species, or his being so small with such gregarious tankmates.

I would say that most Petros are more gregarious than trophs ime and a singleton shouldn't present any problems whatsoever. I don't know about treating the whole tank if you don't think you have bloat, but that's another thread entirely.

[Mastiffman/ Duramax7Man7]

I agree with Sean. He's got good experience so definitely some good advice to consider.

[fishlass]

He stopped grazing then I saw one of my trophs not swallowing food so I kinda panicked and started treatment. Glad to know that just one would be fine, that's what I was hoping when I got him. I just love those big happy smiles!

[Mastiffman/ Duramax7Man7]

Probably not a bad idea treating the whole tank. Metro is a light antibiotic and can be used at 3 and even 4 times the normal dose safely.

BUT, as with any antibiotic, it must be used for a minimum of at least 5-7 days and at a regular duration. So every 8 or 6 hours. I Typically do every 8 hours. Full dose after daily 50% water change.