Thank you but I'm not sure I trust Paraguard, or any treatment for marine ich. It's a personal thing I suppose. Seachem don't seem to understand the life-cycle of cryptocaryon if they say treatment is 28 days or until no symptoms... I need to leave my DT fallow for 90 days to ensure I have allowed all cysts to hatch into the free swimming stage and had 24 hours or so to starve out. If I treat with medication for 28 days that does not cover the encysted cycle time. Also, it seems common knowledge in the hobby, that when marine ich symptoms appear to have gone it just means the parasite has encysted and dropped off to the substrate for a while. Maybe Paraguard also treats encysted and fish hosted (can't remember the proper name for it) stages of marine ich but it makes no reference to the life-cycle so I am cynical about it. I'm not sure dips between TTM actually offers any additional benefit for treating the ich. For treating other things then maybe I am more trusting of it and will certainly consider it if I need that or if going pre-emptive with new fish stock. In that case I would probably just treat in my QT after TTM rather than adding dips between transfers.
I will wait and see from experience if my second batch of fish through TTM come out ich free.
Any advice on QTing non fish items to avoid ich or is 90 day fallow the only sure fire way?