Fry and Triple Med Treatment

[Kim_D]

Very new to this hobby and learning daily. I have a community fresh water planted tank with several varieties of Molly and Platy fish.  Initial tank set up has been a significant struggle as we have extremely soft water with a low pH, so when I lost my first few fish I initially believed it to just be related to the water conditions. Water conditions have been good and solid however for the last 4 weeks- 0 Ammonia, 0 Nitrite, ~20 Nitrate, gH finally stable at ~140 using wonder shells, KH still a little low at ~60 and pH hangs between 7.0-7.2. Lower than I would like but working on it with crushed coral.
I lost another fish last week. In total I have lost 5 fish over the last 3 months (2mollies, 3 platys). I am now concerned that it may have been wasting disease all along. As looking back each fish got skinny, started hiding on the bottom, stopped eating and then eventually died no matter what I did.

I have just order the trio quarantine medications since I am not exactly sure what disease I may be dealing with and nobody appears ill at this time. The tank that I need to treat happens to have 6 fry (2 ~12 weeks and 4 ~3 weeks old). I do not have a separate place to house these fish during the treatment, plus to achieve a clean slate I assume they will need to be treated as well. Are the 3 medications safe to use with the fry? The Paracleanse states that it is but the other 2 do not say. I was planning on treating with all 3 meds at once per the quarantine protocol but wondering if this would be too much for the fry? 
Thank you so much for reading so much. Any help and guidance would be greatly appreciated!

Kim

[Colu]

If it's is wasting disease you would want to treat with Expel p active ingredient is levamisole once a week for 4 weeks I don't think it's necessary to treat with the med trio  Expel p is safe to use with fry it's also possible it's low kH that's causing the deaths your seeing as lack of minerals can cause a lot of health problems in livebearers hopefully The added crushed coral helps you can also us aragonite to raise your KH and GH @Kim_D

[Kim_D]

Thank you @Colu I appreciate the advice. I have order the recommended Expel-P. The crushed coral has made a huge difference but it seems that I still need to find a good solution for a water additive to use with water changes so that I am not causing swings just by replacing water. For future reference can Ich and Maracyn be used safely with fry?

[Colu]

 ick X active ingredient malachite green can be toxic to small fry so I wouldn't recommend using using it with newly born Molly or platy fry maracyn is fine to use with fry @Kim_D

[quikv6]

I have soft water, and mollies/platies. I use crushed coral in the tank, and when I do large waterchanges, I buffer the new tap water with baking soda to bring up the PH to match the tank water.

While it's a bit of a pain, it has been a solid method for me, and avoids any drastic PH changes with large water changes.

If you go this route, I encourage you to test how much "X" amount of baking soda raises the PH of your water in "X" volume of tap water. I found it easy to use a 5 gallon bucket, and then you can do the math from there, depending on how many gallons your waterchanges are.