Is My Tank Having Too Much Free Ammonia?, Not sure about levels tolerated by goldfish Options

[2goldfish]

I have a new tub setup, roughly 70cm(L)x52cm(W)x30cm(D). It has been running for 11 days, 1st four days no fish, then a few small GFs(3) when I thought the cycling had completed (using old tank water).

I added in 3 more (1-1.5inch GFs) as I thought tub should be able to handle?

Two days ago, I bought some anti-ammonia rock (zeolites?) as my Seachem indicator has been reading green since day one. Changed water after 1 week and put it in but no reduction in ammonia as its still at the 'green' colour level (0.05mg/l) free ammonia.

Today, after I put in those 3 layered (coarse, charcoal, fine) combo media with ceramic rings sandwiched inside, the water was getting very cloudy after I repositioned the zeolite, threw out the old OHF filter media but kept the ceramic rings.

I STILL have been getting the same reading...but water has turned clearer by this evening. However, few days ago, the fish were all huddled together at the bottom of tub and occasionally dart here and there. This evening as water got clearer, they seem more lively.

Q: Is there a long term risk to expose them at these rates or should I reduce NH4 to below 0.05mg/l?
Going by HappyBuddha's post about NH4 toxicity levels, it should be ok? RG experts, please enlighten me.

Nitrite reading last taken 1 hr ago: 0.3mg/l
PH: 7.5-7.7
KH: 5-6 dkh

[desireless]

In simple terms:
Too much of ammonia is fatal and too much of nitrates will cause fish to get sick easily.

If you read our archive topics, we always recommend 100% water change. It just doesn't serve the purpose of water changing by doing 50% every time. There are always traces of nitrate left behind and very quickly it will hit back the same reading again.

Seachem Ammonia Alert is a good and essential tool to monitor water quality in your tank. However, once you get your tank cycled, it won't be neccessary. But it is still good to keep the alert permanently installed in your tank - Whenever it is not yellow, you would know that something is wrong. The "grey colour" is probably light blue.