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Yes, hold off until TDS gets close to 300. Let's give the shrimp some time to settle to these new water parameters before going back to weekly water changes.

6 drops means GH is 6 dGH. Or if you want to express it in ppm, multiply 6 by 17.848 = 107ppm. The water parameters look fine. Have any more shrimps look like dying?

Ok so i did 1 final water change at 200TDS, and am now thinking about stopping and letting the shrimp adjust for a few days until Saturday or Sunday when i do another water change at 200TDS and check my readings again. Water Conditions:- PH - 7.5 dKH - 4 dGH - 9 Temp - 23C TDS - 295 NH4 - Unreadable N02 - 0.1PPM N03 - 10PPM PH4 - 0.5PPM My Nitrate levels are in the safe range although my Nitrite levels are un-changed but they are in my safe range so i feel it would be ok to leave it a few days, and let the duck weed do its job because that hasn't grown as much as im used too so someone asked about my tank filter which is integral to the tank design. it works through 2 cotton pads that it just under the water line of the pump section so water gets through into them. below them are 50 plastic balls that apparently allow for bacteria growth as well as breaking down any larger pieces of debris. below are pictures of the design. in the pump section there is just enough room for my 50 WATT heater which does a great job at keeping the tank within 2C of 23C. the Pump is on two thirds power setting. should i turn it up further? the Light in the tank generates what is termed as low light but thats what ive specified the plants which are all real to survive in when i was selecting them.